Hello, y'all. Roselia, Torracat and Swirlix enthusiast Catalisador here to drop my most recent opinions on the current SS NU metagame. Prepare for the heat!

S
Talonflame, currently, in my opinion, is, undeniably, the most splashable, versatile and consistent Pokemon in the SS NU metagame. Its uncanny Speed tier gives it the ability to act as a speed control option for teams. And, with options ranging from defensive sets, thanks to its impeccable defensive typing and access to utility options such as U-Turn, Taunt, Will-o-Wisp and Toxic, to more offensively-oriented variants such as Swords Dance or even Bulk Up, the smogonbird has quickly risen to the top as a gigantic menance.

B+ -> A-
From my experience spamming Tauros for the Snorlax suspect test, I've just got, really, what was expected of the bull: it is an absolutely overwhelming offensive presence! Its access to potent and wide coverage options allows it to hit the entirety of the NU tier for neutral or super-effective damage (a.k.a 2HKO a
at minimum), while its Speed tier is nothing to be laughed at either!
Looking at the remainder of the B+ tier Pokémon, I simply belive that Tauros stands out as an extremely potent threat and, as such, should see a small rise on the VR.

NEW -> B+
Doublade has shaken up the metagame on its own, steely way. It is a very reliable check to the (previously) immensely fearsome DefensePressers, Bronzong and Diancie, as well as offensive threats such as Ninjask, Toxicroak, Tyrantrum and Passimian, all of which have seen a small decline in usage thanks to the blades's addition to the tier. Offensively, it possesses strong Ghost and Fighting coverage and access to STAB priority coupled with Swords Dance, making it a very reliable offensive option as well.
I do not think it is anything out of the ordinary, though. Being a so-called "fake Steel-type" thanks to its special frailty makes it so that teams have to run a secondary, specially defensive Steel-type or a Pokémon that can cover such defensive weaknesses (such as SpDef Diancie). Moreover, having a bad matchup against prominent threats in the current metagame such as Talonflame, Sirfetch'd and fast Normal-types in general (which can block its priority STAB and revenge kill it with potent, SE coverage moves) leaves it in a less than optimal spot. Still a very solid pick, tho, and deserving of a ranking around the B+ spot, in my opinion.

NEW -> B/B-
My first thoughts on Snorlax are that it is actually... extremely subpar?
I don't think Curse sets are too much of a problem to deal with given the dominance of Pokémon such as DefensePress Bronzong and Diancie, Growth Vileplume, Dragon Tail Guzzlord, SD; Bulk Up and Taunt versions of Talonflame, Sirfetch'd and our new NU comrade, SD Doublade. Choice Band sets aren't the most dominant either, nor are they the most effective - they're basically a cheap, slow version of Tauros which locks itself into a move for the chance of luring certain checks to the Curse variant, most of the time. Defensive versions with utility moves such as Whirlwind and Yawn seem pretty fun, but I've yet to give them a try. Overall I just think Snorlax is kinda... meh?

C+ -> B-
Duraludon has become an very popular offensive pick in the current SS NU metagame. The main variants seen are the Eject Pack lead, which provides Stealth Rock support for more offensively-inclined teams as well as a pivotting opportunity with Draco Meteor + Eject Pack, and the Choice Specs set, which hits extremely hard with its potent dual STAB and access to coverage Dark Pulse to hit the likes of Bronzong or Thunderbolt to secure the 2HKO/OHKO on Vaporeon and Mantine, respectively. I think it definitely stands out as a potent pick amongst the other options on C+ and should see a small rise on the VR.

UR -> C
I've been preaching about Uxie for a whileee and now I wanted to make another nomination. This time really just emphasizing Uxie's defensive value. Thanks to its great bulk, it is able to check the likes of Sirfetch'd and Passimian (with a Colbur Berry) or Golurk and Dhelmise (itemless). Its access to utility moves in Stealth Rock, U-Turn, Future Sight, Knock Off, Thunder Wave, Yawn, Trick Room and even Memento makes it a versatile Pokemon that can handpick its moveset to better fit a team's needs.
Lastly, I wanna give a shoutout to Thunder Uxie, which reliably sets up Stealth Rock on Xatu with no need for any Special Attack investment (clean 2HKO!). Definitely give this little one a try sometime!

UR -> C
Musharna has caught my eye recently as a replacement for CM + Rest Uxie on terrain teams. Its superior bulk just allows it to do the setupper job much more easily while mantaining basically the same qualities Uxie possesses - even with access to Moonblast for a stronger Fairy-type attack to threaten the likes of Guzzlord (which does 20 to +1 itemless Musharna, by the way).
It has also seen some little usage in SCL and I've personally brought it to PTPL and used it quite a lot overall and it is definitely a solid pick, currently!

UR -> C
Another little niche pick I've been experimenting with. Its unique typing gives it access to a great amount of resistances which are greatily appreciated in the current SS NU metagame, specially for hyper-offensive teams, surprisingly, being able to check huge threats such as SS Blastoise, Heliolisk and Rotom-Mow, while providing the ever-so-valuable Spikes. It is, also, not an entirely passive Pokemon thanks to its access to Leech Seed and Knock Off, which can punish common switch-ins. (P.S.: SpDef Bullet Seed checks SS Blastoise, y'all).
Little recent replay of some neat Ferroseed action since
Phantomistix and I just battled, I guess (lol):
https://replay.pokemonshowdown.com/gen8nu-1443019149
Edit: oh yeah and PLEASE just unrank Arcanine, that mon is awful.