i personally think we as a community have far too much of a knee jerk reaction and are advocating for quick bans on pokemon much too early when most of the mons being proposed for quick bans do have some counterplay available. now, can they still be broken and be suspect tested down the line? absolutely. broken enough to warrant a quickban 2-3 days after their release though? definitely not imo. i think we as a community have just gotten accustomed to the pre dlc2 metagame, and now that all these dangerous mons are released into the game at once, we label these things as broken because of the power creep compared to the previous metagame, even though we should be more accepting of a power level increase since its not the same metagame. Mostly all of them have forms of valid forms of counterplay that prevent them from being far too over the top overbearing (quickban worthy).
Genesect is probably the one I see players proposing to quick ban the most. I really dont think its that blatantly overpowered like majority of players make it out to be and is not quick ban worthy imo. For starters, we all know Genesect is weak to fire offensively, however defensively, fire types also make excellent switch ins to genesect. HDB exists now which means fire types have a much easier time switching in and checking Genesect without having to worry about SR damage. Things like Heatran, HDB Volcarona, HDB Rotom-H, Volcanion, HDB Moltres can all comfortably tank the vast majority of attacks Genesect throws at them with no issue. In previous gens, you could pair Genesect with Dugtrio to get rid of the Heatran (as Genesect was always banned BEFORE dugtrio/arena trap), but now that Arena Trap is banned, I fail to see how Genesect is broken without the ability to trap its best counter. Douse Drive technoblast does exist, however this can easily be idenitifed by Genesect's different sprite and will never lure a skilled player. Spdef Toxapex is also a pokemon that can switch in vs Genesect all day and can comfortably Regen out tbolt damage if you're running that.
Pheromosa is also another pokemon I see people wanting to quickban a lot. I on the other hand, think its a nice useful addition to the metagame when it comes to speed control, rapid spin support, and pivoting. Z moves dont exist anymore which was the main thing that caused it to be broken last gen imo, and because of that i think its significantly more manageable in gen8. Toxapex walls this endlessly, as it cant QD Z-Hyper beam you anymore. Tapu Fini checks this amazing well too, as well as Aegislash tanking every single attack comfortably with also the ability to spinblock Phero (Aegi was banned last gen so we couldnt rely on that to wall Phero). it also falls to cb espeed gene, outsped by Regi Eleki, and walled by both HDB Moltres & HDB Volcarona (can also punish u turns with flame body).
I really dont think Landorus is quick ban worthy at all. In previous gens, it could be seen as overbearing as you could run it with a pursuit user and obliterate most of its checks. Pursuit doesn't exist anymore and I think its much more manageable now. Now, you can actually run roost latios/latias to comfortably check it without having to worry about pursuit ttar (latias even survives lo knock off after sr). Celesteela checked it really well last gen; this gen it has to worry about Celesteela again AND spdef corviknight as well. It also is hard checked by HDB Mandibuzz, HDB Moltres Galar, HDB Articuno if its not running rock slide, hdb dragonite, and hdb torn-t. The lack of pursuit also makes it so Slowking checks it, and Cresselia walls you endlessly. offensively, it is outsped and koed by numerous mons who are faster, have priority, or weather abuse mons. these include dragapult, phero, kingdra, urshifu water, latios, cb rillaboom.
Really scary threat, probably the closest thing to quickban material on this list, but can still be managed quite decently. of course, spdef ttar, twave blissey/chansey, and spdef heatran are the 3 premier switch ins we have vs this atm. all 3 are really solid picks in this meta regardless of Naga's presence in the tier and can comfortably tank everything Naga throws vs them. Besides that, we also have Spdef Cresselia (lives a +2 Draco Meteor comfortably and fires back with psychic), AV Slowking, occa berry melmetal, and AV Magearna. Another duo that takes care of Naganadel quite well is the combination of Teleport Blissey + Dragapult, as blissey can sponge the +2 draco (even lives +4) and teleports into dragapult, which would then outspe and ohko it the turn afterwards. CB genesect espeed also ohkoes this after 1 round of LO dmg, plus its EXTREMELY vulnerable to scarf ditto (+ scarf dragapult as well which is a really underrated rker).
Blaziken isnt quick ban worthy in my eyes either. in previous gens, it was over the top as it had baton pass + its mega evo but with the removal of those 2, it can be handled much easier now. For one, Blaziken is both extremely frail and its typing defensively is something to be desired. This, in conjunction with its subpar speed, means that is EXTREMELY difficult to put in work vs HO mons, as most of them outspe and do considerable damage to blaziken before it can even do anything. Now, you can run protect, but then without the extra coverage option, you are then checked so much easier by other defenisve pokes. even at +1 spe, if you're ada, you're outsped by Dragapult/Phero/Zera, also scarf lando-t/chomper. max hp latias and defensive cresselia also tank a LO +2 attack and can do significant dmg with psychic in return. you are also still walled by stuff like slowbro/fini, and craw + azu can finish you off. both physdef hippo + max physdef landot can also sponge a +2 attack and ohko back. hdb dragonite walls you. if you run protect, toxapex walls you endlessly, scarf dragapult outspeeds at +2, and this is another example of a mon who is massively prone to scarf ditto.
now, the only pokemon i truly believe to be quick ban worthy atm is Kyurem Black
This thing is super bonkers. gen 8 gave it so many things that pushes it over the edge compared to last gen. Dragon Dance & Icicle spear are 2 we all automatically think of, also freeze dry, but HDB is such a boon for this as well. We all underestimate Kube's bulk cuz in previous gens it was a lot easier to keep SR up and take 25% off kube's health instantaneously, but with HDB it is extremely easy to keep Kyub at full and tank even SE hits. it also has the bulk to take advantage of so many defensive mons, and nothing in the game can switch in on it for free and then beat it in a 1 v 1 scenario. There are some stuff that can switch in on it once but then later fall.
if full health magearna switches in on fusion bolt, kyub can just switch out, and then the next time it comes in, magearna will then fall to +1 fusion bolt the next turn. magearna has no reliable recovery and if its av / choice magearna you have no leftovers either so this is easy to abuse. ferro absolutely needs max def to be able to check this thing, and even if its max def, thats not enough if you dont have gyro ball either. non gyro ball versions get 2hkoed by +1 LO icicle spear in a 1 v 1 scenario as body press doesnt do nearly enough, and using leech seed can just mean the kyub setting up +2 against you. spdef ttar actually loses if kyub uses dd on switch, as uninvested rock blast doesnt come close to ohkoing and ttar gets 2hkoed by +1 icicle spear. if its offensive ttar, then kyub uses icicle spear once on switch, and then switches out, and ttar falls to +1 kyub later on. clef's moonblast doesnt do nearly enough and it also gets 2hkoed by icicle spear after a boost. Aegi is the same situation as Magearna. things like melmetal fall to earth power, quag/buzzwole get demolished by freeze dry / ice beam, and if cresselia doesnt have toxic then its pure set up bait for this thing.
kyube's power and bulk as well as deep movepool is def too much to handle. quick ban that, and the other things are really solid mons but dont deserve quickban, maybe suspect test down the line.