tbh after reading this entire thread and playing over 200 games, I cant say I didnt find diversity over the ladder
some different teams, of every playstyle, for sure. some mons got a huge increase in usage, specially base Spe 100~115 mons, which are many in this tier, like Infernape, Cobalion, Shaymin, Tentacruel, Galvantula, Heliolisk, Salamence (late game cleaners as bulky and regular DD mence got famous, as did mixed attackers), etc. there are others mons that are directly affected by Mega Pidgeot for example and are amazing in this meta, like Doublade. Besides checking huge threats like Cobalion, Mega Aero and Snorlax, Doublade now have an ez time sweeping late game, since Mega Pidgeot ghost immunity really holded Doublade effectiveness after a few hits lol
still, I don't think Mega Pidgeot is an over centralized mon, since mons like Cobalion, Reuniclus and Doublade, that have a somewhat bad matchup against the bird, were still increasing in usage and were already getting out of RU. for instance, other UU power houses, like Mamoswine and Feraligatr, that were already great in a Mega Pidgeot meta (Mamo were A+ like Mega Pidgeot since it got in this tier, and Feraligatr became S rank before Mega Pidgeot), were now more used than ever. I don't think Mega Pidgeot is an op mon or broken in most senses - he is certainly a threat but I guess we have to deal with some threats. If it wasn't for Hurricane confusion chance, he would be a threat like Feraligatr I guess, but not outright broken.
so I guess it all comes to the point where every singular voting creature thinks are the limits of haxing thru your opponent, which are the main point about Mega Pidgeot. If it's in, I guess it can hax thru said counters, like Florges, Snorlax and Empoleon, without even needing a Work Up set, but in other hand he is a somewhat frail mon, have a hard time switch in and actually fails to OHKO or 2HKO most offensive meta, like Mega Swampert and Mega Aerodactyl, while being easily 2HKO or OHKO in return. If you think the times he haxed thru you went from annoying to a broken mon, go ahead and vote to ban. But if you think there are more problematic haxing mechanics, like Scald, that doesn't receive the same threatment, vote to keep it in this tier. For me, I'm still not sure, for this case, at where this hax limit is, so I will abstain in this suspect test.