Gonna just dump all my opinions on the meta despite nobody asking:
People who think Deoxys isn't busted don't understand the power of Life Orb Psycho Boost. Hazards Deoxys is good and all, but offensive 4 Attacks mixed is where it's at. Psycho Boost, BoltBeam, and Superpower is all you need. Stellar tera type means you can nuke with any of its moves to take out a wall. Its super busted.
I wouldn't say hes mid. Hes a great pokemon for sure, but not busted. With Vacuum Wave distribution being increased, Fairy types being everywhere, and power creep doing its thing, Darkrai is just too frail to be busted. Still great with NP, Scarf, and Specs, but not busted. Maybe after a few bans it will jump to being busted without some things around, but for now it's fine.
Rain just got significantly better. Keldeo and Archuladon are so good in rain it hurts. You don't even really NEED a swift swim user anymore, although Basculegion and Barraskewda still do the funny things they always have. Rain went from being 3rd best weather, to possibly the best weather. The big winner of the DLC for sure.
This thing does the same damn thing it always has, but with Deoxys running around with Ice Beam, it hasn't been able to shine much. Regardless, Gliscor will return to its throne soon.
Shouldnt of even been unbanned. Volcarona has done the same thing since Gen 5, but now still has tera to take lives. Once again with Deoxys around, Volcarona cant shine as much as +1 still doesnt outspeed, but once Deoxys is gone, Volcarona shouldn't be far behind.
Archuladon, Raging Bolt, and Hydrapple are 3 bulky bois doing bulky attacker things and I love em all. Hydrapple's got that AV Regenerator sets doing work with great coverage. Stamina Archuladon finally lets Stamina shine bright, and Raging Bolt has special electric sucker punch. Love all 3 of these, I think they will all settle in the A range. The Bulky Offense meta will rise again.
The big loser in DLC2 imo. It just doesn't do as much anymore with more dragons running around like crazy. Is going to have to adapt and run Play Rough constantly if it wants to keep up, but even then the bulky bois just gatekeep it. Poor guy
GOD I MISSED THIS THING. Leaf Storm Contrary is so funny man, and now can use Tera to cover all of its checks along with Dragon Pulse and the annoying af Glare. I think Serperior will be A+/S- once the meta settles, its just so good.
Has been kinda put in the shadows with the new toys, but people are underestimating it. DD Prism Armor is very nice. 100 BP Stab Psychic Physical move still hurts, but has to settle for Brick Break as a Dark type answer, but can make it work with Tera Fighting to wipe out Gambits. +1 Knock Offs also really hurt things neutral and above while adding the utility of getting rid of items. It did lose Rock Polish so Double Dance sets arent going to be viable really unless ID + Calm Mind could possibly work but idk. Nice heat option, could be a good niche low B tier pick later on.
boo-womp. This thing is going to UU. Bulky Psychics just suck, and Deoxys is way too passive to get things done. It can be set up on so easily. Definitely the worst Deoxys.
DDance and Specs Kyurem still nuke hard, but is now BUFFED with Snowstorm giving it a defense boost, letting it pair well with AloTales for easy nuke access. Will definitely be on the radar once Deoxys-Speed is gone.
EDIT: COMPLETELY FORGOT ABOUT
Stellar Tera Contrary Tera Blast is horrifying, combined with Superpower and Play Rough, or even a special set with Moonblast and Mystical Fire makes this thing unpredictable, could follow in the ban wave.
TL:DR: Deoxys-Speed gotta go. Volcarona, Gliscor, and Kyurem (AND ENAMORUS) may quickly follow. Rain is goated with the sauce.