The mere fact that "overpowered" is an applicable term for it in a tier where everything is overpowered is pretty telling of just how stupid Mega Rayquaza really is.
i will just ignore your beginning post mainly due to the fact one persons claim really doesn't form an general bias on an argument, especially where in this tier abusing more then one of the same/similar abilities tends to give good results (double imposter, double protean etc, etc.) making that entire point pointless to mention.
something i just want to make clear, is that "the mere fact that overpowered is a applicable term for a tier where everything is overpowered" is incorrect in MANY ways. first and furthermost, this isn't a new concept to the teir, and we always have had pokemon so powerful that the meta had to shift dramatically to handle it, and heck, it still does to this very day. actually we have a few currently. we have had chansey and shedinja being the MAJOR influencers, and even back with the 510 ev limit non existant, ph was a dominant ability to the point that it was very hard to take down various pokemon (xernias, kyogre, regigigas, etc etc) we do have overpowered shit in this teir, look at chansey and shedinja, they single handedly mold our teir. but at the same time, we keep THOSE because they fix the metagame to make it balanced(ish). taking them away results in a metagame no one will like.
second, and this is a bit of a "nitpick" on my part. bh is by no means a "overpowered meta" mainly because when everything is overpowered, then nothing technically is. when two powerful objects collide, they both just stop...they dont break through eachother and proceed to destroy everything in their paths. and bh is no different.
and lastly, as uselesscrab said, its mostly aerialate that is doing this, though thats solely because rayrays offenses make it the PERFECT aerialater, since all aerialaters have powerful moves that are easy to block given you have access to ways to block them. if aerialates gone, then it will just end up like the other protean users, completely overpowered and next in line to be banned.
like...again...im still questioning why everyone is screaming overpowered on mega rayquaza...barring aerialate, it CANT run mixed, without really fucking over your team to imposter in the process. i mean, im all for banning mega ray, but whats the point when we are just about to suspect the MAIN REASON ITS BROKEN. if ilates stay, then ill be all for banning mega ray. and heck, im all for it now too, its not like i even USE mega ray.