I personally intend to vote ban on Chi-Yu, Annihilape, and Cyclizar.

offers an offensive premium that is fat past acceptable or containable levels in OU. It's pool of counterplay is far too limited and it warps the tier because of this (either in-game due to not being sufficiently ready or in-builder due to being limited in what you can use for it too much).

is a more interesting case, but Taunt+BU variants cross the line for me. You can force walls into attacking you or walking a very thin tight-rope to pivot in a faster threat without allowing too many free chances pretty much, making the balance/bulky match-up absolutely dire. Yes, new things like RH Chomp + Salt Cure Tera-Garganacl cores can help mitigate it a bit, but the pool of consistent answers is very limited and generally you need half your team + good timing to minimize it. Offensive teams contain it better, but even they have to watch out for timely Tera letting it escape trouble and do even more damage with Rage Fist. I find very few games where Annihilape struggles and very many games where it forces opponents into an awkward spot, threatening to sweep or claim multiple kills (or just generally large amounts of progress).

I find to be the catalyst of a lot of worrisome strategies, abusing any passivity with a virtually unchecked free-turn for some of our premier offensive breakers and set-up sweepers. I think this one is a tougher case and I understand why it got a lot, but not quite enough, votes the last few times. I remain mostly firm in my stance just because it punishes any free turns or defensive play way too much for the metagame to remain balanced with the tools it can pass to. I can expand on this one more later as it deserves the most examination of the three, but definitely a problem in my eyes.
Others I can see cases for and I am not 100% voting no ban on yet, but I am leaning that way and can post more on later perhaps.