I've already questioned the balance of other kinds of weather, and you already know what I think. Hope for a qb.
Protect wastes rain turns while only needing one Speed Boost to get over every Swift Swimmer available. 
Surge Surfer > Swift Swim. Raichu-A in Terrain is faster, and will fry most components of a Rain team without much trouble. 
Water immunity, resists the secondary STABs of several Rain sweepers, and has priority options like Vac Wave and Sucker Punch. 
Prankster Tailwind is an option I’ve used in the past, and it puts in a lot of clutch work. 
Messing them up with your own weather is an option as always.
Mienshao has been oft compared to Passimian in SM NU. There is very little drawback to using it because of its reliability at revenge killing and pivoting, but the key difference between the two is Regenerator. Regenerator makes Mienshao significantly harder to punish through passive damage like Spikes and Rocky Helmet because it'll just recover off the health lost, and despite its poor bulk it rarely finds itself taking hits because of its great Choice Scarf-boosted Speed. Additionally, all-out attacker sets with Life Orb have been popping up lately to better manage potential Choice-locked Mienshao answers like Sylveon and Sigilyph and take advantage of Regenerator.
On paper, Bewear doesn't really have defensive counterplay. It's strong as hell and has just the right coverage between Normal + Fighting + Dark. Its bulk courtesy of good HP and Fluffy help provide it with plenty of chances to switch in to wallbreak and help it survive some very random hits like Choice Scarf Mienshao's Close Combat, and with maximum Speed investment and a Jolly nature it outpaces the entire defensive metagame and much of the slower offensive metagame. (Drizzle): Drizzle has enabled Pokemon like Tornadus, Kingdra, and others to run rough shod over the entire metagame. There's very limited counterplay to the powerful attackers that rain augments, and automatically setting rain on entry exacerbates this further because you don't have to waste a second turn to have the weather up. Even outside of rain, Tornadus is a huge threat. It's fast and strong as hell, can boost with Nasty Plot, and has great coverage to punish potential checks like Bronzong, Gastrodon, and Sylveon, with a deep utility movepool to further its versatility. It's also a premier beneficiary of rain with its perfectly accurate Hurricanes and Water-type Weather Ball, which turns Diancie from a counter to a shaky check. Ever since Rhyperior left, Toxtricity has been getting discussed a lot more as potentially too much for the tier to handle. Very few Pokemon can handle the combination of Overdrive + Boomburst, and several of the few that do end up being pivoted on by Toxtricity's Volt Switch and exploited by whatever it brings in. Shell Smash Barbaracle is dangerous. After a boost, there isn't much that can tank a hit from it and OHKO in return, and the potential aid of dual screens makes it even harder to safely remove after being damaged. Additionally, Barbaracle can tech a few moves in its last moveslot to pick and choose its answers: Superpower for Bewear, Grass Knot for Gastrodon, and Switcheroo for general all-game utility when paired with Choice Scarf. Porygon-Z is an incredibly potent wallbreaker, Adaptability Tri Attack has very few switch-ins outside of Steel-types, Gigalith, and Porygon2, and all of these foes are susceptible to Trick on Choice item sets. Although Porygon-Z isn't the fastest, it can utilize Agility to mitigate that issue while simultaneously becoming a threatening setup sweeper.
Sure, Sigilyph fell to PU a week ago, but that doesn't make it a highly volatile threat in NU. Its coverage is insane, and only Porygon2 is truly consistent defensive counterplay. Sigilyph is very adept at taking advantage of passive Pokemon like Gastrodon, Mantine, and Cresselia to get wallbreaking and setup opportunities, and the removal of Pursuit has made it very hard to pin down and remove even after a death fodder. Galarian Slowbro is incredibly versatile between its Assault Vest and defensive Calm Mind sets, and there's a strong case to be made for Quick Draw sets simply being uncompetitive. Even removing those from the equation, though, Galarian Slowbro is a menace. Calm Mind makes it very difficult to take out, whereas Assault Vest sets can use its great coverage to beat down defensive cores and set up for offensive teammates with Future Sight.
(Rain/Drizzle): I think rain is very overwhelming for the tier to handle it with so many good abusers and auto-weather which Politoed provides thanks to its great typing and bulk and also the access to drizzle as a bility and damp rock, which furthers the rain-turns from 5 to 8 making it a very good mon and rain very overhwleming to face. Tornadus, Kingdra, Ludicolo, and other Pokemon like Heliolisk can abuse rain in a sentiment where not a lot opf switches are able to come in on their great attacks, be it a strong 100% hurricane or a drizzle-boosted water-stab. i think rain should go asap as the counterplay to it is very limited and most Pokemon, which can check them will fall to their coverage options or their teampartners. itself: I am not too sure about tornadus itself, if it should leave or stay with rain being gone, right now it is pushed over the edge by rain and I want to see how it is on the battlefield without rain making it a mon, which has no switchins at all. I am perhaps on the fence on it, but I dont mind it getting banned, If there will be an upcoming slate with it on it. but I really wanna see it without rain first tbh. quick draw and quick claw alongside great tools in coverage options + great boosting moves make this pokemon a very versatile but also dangerous threat fpr the nu-tier. sure some people would say quick draw + quick claw is a luck-based gamble, but in my opinion, quick draw is an uncompetetive ability, which lets you to a very high percentage act first, means after a boost, you can KO a mon even before it is able to touch glowbro in the slightest, and we all saw already plenty of games, where glowbro was just the wincon solely by the ability in quick draw.
(Drizzle)
From its arguably best Choice Scarf set to its Life Orb AoA set, Mienshao is the pure definition of splashability and consistency. I completely disagree with its nomination. Although it, indeed, provides immesurable versatility, it is by no means overpowered or overcentralizing. Who keeps nomming this mon? DO NOT BAN. (Drizzle): After a few games, I've come to the conclusion that rain is absolutely manageable in the current SS NU metagame. Defensive staples such as Dragalge and Gastrodon establish themselves as top anti-rain picks while other pokémon such as Blastoise, Goodra and Comfey provide nicher checks for the once-mighty weather. As of right not, though, I say DO NOT BAN rain. Inside rain it shines and is extremely powerful, but still not banworthy in my eyes. Outside rain, I always think it lacks something? Usually a little bit of speed, to be honest... But yeah, fantastic pokemon but definitely not ban worthy. DO NOT BAN. Although it has little switch-ins, mainly the likes of Porygon2, Diancie and defensive Decidueye, Toxtricity doesn't seem broken in practice. It is an extremely potent breaker, but the lack of speed and its movepool creating 50/50s make it manageable. DO NOT BAN. I disagree this pokémon is ban-worthy as well. It has decent enough checks in the likes of Bewear, Gastrodon and First Impression users after setting up and even before setting up it can be manageable enough by adopting a more aggressive gameplay, by keeping up momentum or removing screens off the field - ensuring Barbaracle doesn't have an easy entrance to setup. DO NOT BAN. Differently from Toxtricity, Porygon-Z has virtually no switch-ins with its better coverage moves, access to better setupping tool in Nasty Plot and the ability to 2HKO the entire tier (bar SpDef Diancie). Yeah, this is my first BAN. I haven't seen too much of Sigilyph, but the ones I've seen haven't been of too much trouble personally. It seems like a healthy addition to the metagame, despite being PU. DO NOT BAN. Yeah, DO NOT BAN. This pokémon is an amazing, healthy defensive glue that CAN be punished by common offensive pokémon such as Specs Starmie, CB Pangoro, Flygon, Toxtricity, etc.. It provides decent offensive pressure via Future Sight, a high-skill cap move, and, although the gimmicky Quick Draw does make it frustrating to deal with sometimes, it is hardly a broken pokémon itself. If anything, revisit the Quick Draw ability on the next slate.
Barbaracle was banned for it's insane sweeping potential after a single Shell Smash. It's dual STABs give it fantastic coverage, and the freedom to run whatever fourth move it deems necessary to break past would-be counters. These commonly included Superpower for blasting through Bewear, SpD Gastrodon, Ferroseed, and Duraludon, Grass Knot to nail certain Water-types, and Earthquake. Overall, Barbaracle's ease of sweeping put too much constraint on teambuilding and was far too consistent for how many opportunities it could create to sweep uninterrupted. Tornadus was blessed with insane power, coverage, and Speed which put it at the forefront of our radars from the moment it dropped. Ultimately the council deemed it too strong, and it's pool of answers far too limited for it to be a healthy addition to the tier. Slowbro-G has been a controversial Pokemon since dropping to NU. It's standard Regenerator sets are a nightmare to deal with, whether it be Calm Mind or Assault Vest, and those alone made it a potential banworthy contender to some. However, with the rise of Quick Draw sets opening an even more uncompetitive avenue to Slowbro players, it was near unanimously agreed upon as too strong for the tier.
Speed Speed
Power, Coverage
Power
Power Speed
Power, Speed Speed, Power Bulk, Speed Speed Power Speed Power, Coverage
Speed, Power Coverage
" Barbaracle's role was that of a Shell Smash setupper. Thanks to a free, no-drawback Life Orb boost to its STAB Liquidation and coverage moves (Superpower or Grass Knot) on top" Here are some calculations with the Pokemon you are referencing and it doesn't even account Adamant Barbaracle:
should be used more imo.
With Calm Mind and Freezing Glare and Hurricane Swords Dance Set Shell Smash Set Mixed, Special, or Physical Swords Dance or Nasty Plot Sets Calm Mind Set Swords Dance or Nasty Plot Sets Dragon Dance (with or without Scale Shot) offers Nasty Plot Sets with great coverage-options Swords Dance Set with the ability to break past fairies due to Gunk Shot in its arsenal
Nasty Plotter Plenty of strong Base Power Moves on a Dragon Dance Set either Physical or Special Shift Gear veriants (with or without Throat Spray)
I feel like beating a dead horse at the moment but you asked for it so ...How the the NU council became the Grinch that stole my Christmas by making screens a nealy-unviable playstyle.
Aight, imma do my weekly complaining session early this time. Time to talk about how Barbaracle was a perfectly fine and healthy addition to SS NU and how it only benefited the plurality of playstyles in the metagame.
1. Barbaracle's role
Barbaracle's role was, mainly, that of a Shell Smash setupper. Thanks to a free, no-drawback Life Orb boost to its STAB Liquidation and coverage moves (Superpower or Grass Knot) on top of already possessing phenomenal dual Water/Rock STAB, the barnacle quickly solidified itself as a premier offensive threat on the SS NU metagame.
2. Barbaracle counterplay
Although on paper it might seem broken, on practice it is way easier to manage Barbaracle. Defensive counterplay is found all over the place: Gastrodon, Milotic, Bewear, Blastoise, Vileplume, Quagsire and Ferroseed are all premier defensive options against it, while offensive answers in potent First Impression users such as Choice Banded Flygon and Golisopod are also viable. Other niche picks such as Toxicroak and Poliwrath also dealt with it extremely well after setting up.
Furthermore, it is easy to keep up the pressure against a Barbaracle, either by defogging away their screens (Barbaracle's best friends and catalysts to its power) or keeping up the offensive momentum.
3. How Barbaracle leaving affects the Dual Screens playstyle as a whole
With the barnacle's departure, NU loses the last string holding screens together, in my eyes. Now, we lack strong setup sweepers/abusers of playstyle. Here is a list of settuping options for dual screens:
In red are some flaws to each setupper's specific set. Ex.: Flygon's extremely mediocre power makes it unable to properly sweep, same with Blastoise's subpar offenses and coverage or Turtonator's speed.
Barbaracle provided a strong breaking/cleaning option for such overall subpar settuping options, making the screens playstyle overall more concise. Now, it is much harder to chip down/clean teams with a dedicated screens team of your own, in my opinion.
Lastly, I wanted to hear y'all's opinions on the subject. Is dual screens ruined forever?! Should Barbaracle have stayed in NU?
is a cool mon that can check a lot of threatening offensive mons and pressure the opposing team. here's a list of good things it can do:
. Copperajah Mienshao Bewear Dragalge Pangoro Porygon-Z Starmie Vileplume Celebi
Diancie 
Gastrodon
Goodra Noivern Sigilyph 
Toxtricity
Bronzong
Dhelmise Indeedee-F Milotic
Mudsdale Porygon2 Shiftry Sylveon Weezing Zoroark
Aerodactyl Blastoise Comfey Cresselia Flygon
Golisopod Golurk
Inteleon Talonflame
Araquanid Articuno-Galar
Charizard Decidueye
Gigalith
Guzzlord
Heliolisk
Mantine
Palossand Salazzle Tyrantrum Escavalier
Machamp Ninjask Raichu-Alola Roserade
Sceptile
Scrafty
Arcanine
Espeon Quagsire
Xatu
Aurorus Pincurchin
Swirlix
this is gonna be a rambly post cause im not sure where to begin but building in this tier rn is fucking miserable. some of this stems i think from some mons that probably could have been banned in this past slate and some of it i honestly have no idea what to do about. (for the record, im going to be approaching this from the perspective of building balance).
so problem number 1 as i see, is there are two stealth rockers that can be used unless you want to start off in a massive hole in the builder: raj and zong. both of them provide so much more defensive utility than the others that its mostly pointless to go around them. diancie is also decent but even then i find myself throwing like an av raj on the team somewhere to compensate. the psychic, dragon, and fairy resists provided by these 2 mons are just too damn good to pass up on realistically. they both provide some unique things, w raj having a damn good offensive presence and zong adding ground immune + ability to use tox and fitting a number of 4th moves that can be tailored to the team: protect so its team is less vulnerable to certain breakers, eq for electrics, psychic for plume, and body press for raj and goro. however, both mons have two main flaws: they leave u w/o a volt immune (which has often been filled by the rocker in past metas) and leave you vulnerable to dark, fighting, and ghost type breakers.
for the volt immune: most of the ground types in this tier suck ass now bc they leave u exposed af to cress, sigilyph, noivern, etc. as far as i see it you have like flygon, palossand, golurk, and gastro. palossand isnt terrible, but it still more or less requires a raj or zong to fulfill the gaps it leaves. gastro does some nice things between being able to blanket check waters, dragons, and fires, but has a pretty big issue in being passive as shit, losing to both zong and raj (if power whip) and still getting blown back by all our offensive electrics- boomburst toxtricity 2hkos even if max sp def. golurk is a great breaker but cant check any of the fighters really. so in terms of pure utility flygon is gonna be the pick here most of the time. good speed tier, can do some ok things w cb, and can win some games w dd. while i dont think volt immunes are mandatory necessarily, having toxtricity (and to an extent heliolisk) and a bunch of other perfect voltturns mons make it extremely risky to not do so currently.
now we need to solve another issue: we get owned by fighters. mienshao, bewear, and pangoro are all massive threats that need to be accounted for. and here's the problem: only plume and sylveon have the bulk to hope to switch into these more than once. and even then, bewear can still get around these w/o too much of an issue, pangoro means sylveon is at risk of getting ohkod, and mienshao can pivot around us endlessly thanks to regen, so we'll want to make sure we have something that can maybe switch in w the right prediction, outspeed, and ohko. this can be our own mienshao, noivern, sigi, or cress (which has the bulk to win 1v1 vs any of these).
to round out the team we throw on a breaker, this can be whatever we want for the most part, and then something bulky enough that can keep up momentum. this can be milo, golisopod, dhelmise, arcanine, noivern, talonflame, we have some options.
ultimately the second you deviate from this formulaic style of building, is that you risk autolosing to something like cress, mienshao, sigilyph at team preview. and even w this, sigilyph can still own depending on the set (flame orb cm air slash), mienshao still puts a ton of pressure (particularly if it's LO pjab and we dont have plume). mienshao is imo way too hard to punish for a mon w its speed tier and power. the only way to reliably stop it defensively is to hope you can effect spore sleep or para onto it w plume. thats about it. gl if you run into mienshao + sap sipper goodra or smth that blocks strength sap; eventually u will succumb to sr and mindless uturning
cress and sigi are also threats that can win from team preview. sub cm cress is a nightmare to deal with unless u have zong or raj. and even then it can beat them if youre able to get a knock on either. ultimately cress is kept in line by its lack of power which means a lot of teams can respond immediately or pp stall it w stuff like milo, sylveon, talonflame. cress can run psyshock or stored power to get around these at the cost of sub or immediate recovery, which are both viable options. sigi can also just get around things that want to deal w it by spreading burns, and its better power make it able to break everything once it gets boost, at the downside of much worse bulk. while im not convinced either are broken yet, i do think they kind of enforce the formulaic teambuilding.
the other thing that sucks to me is im not sure what the solve on this is. i do think mienshao is broken (poh does a good job outlining my general thought process). u have a scarfer w a perfect speed tier that can potentially break for itself and make progress by getting rocks up -> knocking the fighting switchin -> spam uturn. and w regen you cant make progress vs it. throw on LO and all the sudden you can just eliminate sylveon or flyers w poison jab/stone edge if u so choose. ultimately the same teambuilding issues remain w or w/o shao, however. i think this is likely the case w everything else on the slate.
i'd like to hear ppl's thoughts on how they deal with making teams rn, as revving up the builder the past few weeks for me has turned into groundhog's day (1993) where i create teams that share at least 3 mons with every other team i make that all lose to flame orb cm airslash sigilyph. my mind has turned into a bowl of vichyssoise and if i have to watch another game of sylveon/raj/flygon/mienshao/milotic/filler i might get permanently trapped in the void, rambling to anyone who passes by how things were better back when we just threw sandaconda on teams to check silvally
so this post isnt just a stream of bitching, i'd like to point out a mon i feel underrated currently:
generally speaking, ive found jolly nature w enough speed for max bewear (96 spe evs w jolly), max hp, rest in sp def to be pretty nice. ive also gone adamant on defog sets to have a more immediately threatening brave bird and cc. i havent rly seen anyone else run it and i def have to recommend it.
- walling dhelmise and golurk in particular
- good bulk and recovery to soft check a lot of things like noivern and flygon
- potentially open up holes for other mons w a strong brave bird and cc.
- punish defog, sylveon's moonblast, and vileplumes strength sap with defiant
- access to sub and bulk up allow brav to punch holes midgame or clean teams: can set up pretty reliably on both raj and zong, and has the power to punish initial switchins like toxtricity fairly well.
