The thing that separates Dragonite from the other Tera DD cheesers is that its
counterplay is actually reliable. Roaring moon and gouging fire were broken because the pokemon that “answered” them just had to hope they weren’t a certain set. Dondozo’s fat ass sits on every set except CB (even then the only thing threatening it is outrage which can be exploited), Metal Birds beat everything except fire punch encore (which just means its walled by something else instead). Considering most of its sets don’t even run stab, most fat guys can soft check it. Theres also just the fact that almost every scarfer / BE speed mon outruns it (Unlike Moon, which outran every scarfer capable of ohkoing it after a boost) The Tera Blast sets are pretty cheese but get rid of that move and I don’t see how it could be considered remotely a problem.
Also I agree with what
Avira said, It’s ability to soft check a bunch of things with stuff like multiscale, encore, and dtail is generally speaking a positive for the meta
To be clear, I do agree that the only problematic part about Dragonite is the range of two-attack sets it gets access to with Tera Blast (Ghost/Fairy/Flying/Fire), but I will say that I think this list undersells its threat level a bit. Volc's massive issue, to me, was how easily it could get multiple boosts through bulk investment/Flame Body/its natural typing/Tera/Morning Sun, and once it got to +2 the scarfer/BE backup plans kinda fall apart. Goug was similar, and I think Dragonite's in this category, even more naturally than Moon (which only really used certain bulky sets to do that, and more often just using the BE boost to be scarier after a single boost).
Dnite just really thrives off of "get a boost on something that can't touch it -> tera on the initial answer -> get another boost -> sweep at +2/+2" sequence that it gets so many of because Multiscale gives it such a crazy level of bulk if you save it for the endgame, and Encore/Roost just exacerbate that. Like, Corv is definitely a good answer, but Dnite definitely has ways around it; for one, you kinda need ID because even seemingly unthreatening Dnite sets can just muscle through eventually (especially if they have Roost), but even if you have ID, you have to dance around Encore, Tera Fire is a massive issue, Tera Ghost requires you to be Brave Bird + ID, and all the while you need to dance around the fact that the Dnite player has so many more ways to generate momentum off a panicking Corv than vice-versa. Encore Val is certainly a reasonable offensive check, but if it's Espeed then clicking Encore is very much not a good outcome for you, clicking Moonblast instead runs the risk of them just eating it to get to +2 and outspeeding you, and alternatively it can just switch, keep the Multiscale, and next time it outspeeds at +1.
I'm not really convinced Dnite's broken, it's definitely possible to layer "mostly probably secure" answers onto your team so that you can contain it, and the utility it offers from being a not-passive check to a whole bunch of mons like Ogerpon or Moth is really nice so I'd really rather not see it banned, but it's definitely entering the category for me of "definitely or maybe problematic things that would be unproblematic or at least much less problematic without Tera Blast", a list that includes at the very least Volc/Espathra/Goug/Moon/Gambit/Eleki/Kyurem.
This is getting more into the realm of policy questions, but we really are in uncharted waters, so
what do the policymakers think on the Tera Blast question? The list of move ban cases keeps growing (Shed Tail/Last Respects/Baton Pass/Sleep), and clearly the standard for a bannable move isn't "every user has to be broken" or even "most users of this move are broken" (because I don't think anyone thinks that a bunch of ZU trashmons would be running over OU even with unrestricted Hypnosis), but rather something more like "as long as this move is permitted we're just playing a never-ending game of Whack-a-Mole to deal with the next-most broken abuser". And I mean, that's not a standard that gives us an objective line where we go from "ban the abusers" to "ban the move". So what do y'all think? And what do you think would have been the earliest point where we could ask the Tera Blast question? Would policy have accepted a potential Tera Blast suspect going back to, like, the Volc suspect?