Alright just an FYI, I've gotten past both Blake and Terra and they only received slight buffs and modifications (Rotom-F now has Thunder). As for that whole Charlotte Mega Charizard issue, I can run Y, but I have to drop Darmanitan completely because it's just too strong in those conditions. A lot of her Pokemon would also lose their perfect EV spread, if any other than Ninetales and Charizard would even keep them (maybe Torkoal would get them). If people all agree on Charizard Y, I will change her team up, but again, she'll be getting nerfed hard if I do to make her more or less tolerable under sun conditions.
As for why nobody else is on, there's just so much to do and polls with them would basically have no impact. Solaris is getting a Mega, but it isn't Garchomp for an FYI. As for Fern, my planned team for him is Ludicolo, Mega Sceptile, Krookodile, Scizor (Banded), Roserade, and Serperior, but if one of the pokemon gets a higher vote I'll certainly reconsider. As for Megas on Julia and Flo, that won't really have that much of an impact on the difficulty and would be a cool little feature if you want it.
Ciel and Taka are a whole different story. I already know Arceops is going back to Ciel, but I think Talonflame is going to be a Charlotte exclusive...if Houndoom is voted on (it's just too weak for Ciel to really use). The only thing out of question for Ciel is Dragonite and Salamence, but the rest are pretty much game if someone wants to make a suggestion. America Bird...while I love it is probably getting the axed and I'm really debating on that Chatot as well. Seriously, nothing is safe from the axe (except Mega Altaria) so throw suggestions down there if you want. Right now, I'm going to test Charizard and possibly Skarmory to see what I can do with them. Taka...I'm going to try a couple things with, but I don't think he's going to be super hard. Floatzel is better than Huntail though without question.
Edit: The next update might not appear for a few days though because it's a huge post.