Banning Tera Blast would cause a ripple effect on lower tiers where the move probably isn't a concern. Y'all have to keep that in mind. It would affect the viability of some Pokémon who're desperate for coverage. I wonder when the survey is dropping.
actually, since i have some experience with the lower tiers now, let me go ahead and travel down the tiers and see what this ripple effect might do. i won't say anything as to how much or little the tiers will be stabilized or destabilized, what sort of new meta dynamics might arise, or what might rise or drop or be banned (besides from ou) since my experience with lower tiers isn't
quite extensive enough for me to make those kind of calls ahead of time and my crystal ball that lets me see into alternate timelines has a spotty connection right now. instead, i'll try to predict some of the changes we might see and let people more familiar with those tiers make their own judgements. if someone with more extensive experience wants to add their own analysis of the potential effects of a tb ban and/or thinks i'm wrong about something here, feel free to chime in
uu
enamorus and iron moth might drop—enamorus because stellar tera blast is a pretty significant tool in her kit, iron moth because it would be forced out of many of its current roles by volcarona. regieleki would drop post-unban because it's just straight-up not good in ou without coverage
nothing drops down from uubl because of a tera blast ban, at least not immediately. the only currently uubl mon with a significant tera blast presence was galarian moltres and that was broken as fuck either way
the loss of tera blast would definitely affect hyper offense in uu—polteageist would lose pretty important fighting coverage, comfey would lose
extremely important ground coverage, serperior would lose virtually
all its coverage, and quaquaval would lose that stupid electric thing it does. this is very notable because
fuck all of these guys. hyper offense has been a bit cancerous in uu for a while now and i for one would be glad to see it taken down a couple pegs
aside from that, some less obnoxious but still offensively powerful mons like thundurus-therian and
especially sandy shocks would be affected. shocks actually runs tera blast slightly more than half the time, so it'd definitely feel the impact of this more harshly than a lot of mons
ru
blastoise might be unbanned, since electric tera blast was a pretty significant plot point in its suspect, but i'm not entirely sure—there are other very good teras blastoise can opt into that have a small enough overlap in counterplay that it might still prove problematic
yanmega would almost certainly be unbanned. even though its air slash setup nonsense is stupid, its biggest weakness was that it relied heavily on ground tera blast, so removing the option from it would make it much more manageable
not much currently in ru really gets
devastated by the loss of tera blast; most things either have other similar coverage they can slot in or a different function that can keep their head above water. ribombee loses what offensive prowess it had but still has its wacky webs utility. hisuian zoroark stops being able to do its silly stab tera blast bait shenanigans but those were never really consistent anyway and it still has hyper voice. volcanion suffers a notable amount actually since it can't go for fairy or dark to break its checks but still chugs along, gengar just bites the bullet and goes for focus blast or dazzling gleam or whatever, rhyperior
wait why were people even running tb on this, etc etc. the only thing that sees a major viability drop is magnezone, and also gyarados but that doesn't actually exist lmao
nu
i've never actually played nu so i don't know anything about it
pu
nothing drops from publ because of a tera blast ban, it's all either dumb setup things that had the coverage they needed anyway or dumb breakers that could just click one move and didn't need coverage
now as for the mons
in pu, some of them would get hit fairly hard by this. toxtricity loses that stupid tb ghost set that i hate, salazzle can't do her tb ground shenanigans anymore, florges... well, florges can do a million different things anyway, she can take care of herself. other affected parties include tornadus, hoopa, indeedee-f (shut up she's totally a thing there, i don't care what the usage stats say), minior (if you're cringe and non-edgequakepilled), and frosmoth (seriously folks try frosmoth in pu it's actually goated). all of those run tera blast a pretty significant amount, so i think pu might end up seeing some of the largest overall changes from a tb ban
now let me repeat, i'm not suggesting a tera blast ban would ultimately be good or bad for any lower tier in particular because everyone's opinion on these effects would be different. personally i could go either way on tera blast at the moment. i'm just presenting, neutrally, what i think might happen as a result of a tb ban. i'd suggest that people avoid factoring any of this into their decisions when voting on tera blast in ou, but i legally can't stop you from doing it