The usual disappointment in their new games: Not bringing loveable features such as Pokémon world tournament and the Pokédex inhabit list back in the game. But yeah, you can notice that this is pure Gamefreak work. Taking something and giving something new in return - If that's actually a positive or a negative thing is up to us, no? And I only experience lagg in those annoying horde battles.
My main disappointment would be the entirely game itself. It seem that they've been working so hard on Mega evolution, 3D models and such that it feels... lacking, it lacks to many features in my opinion. In the previous game we had many new feature, Habit list, world tournament, many varities of swarm, actual something decent to do in the post-game such as the Hollow Tree and Black City/ Actually what the heck do we even have after you beat the elite four. Catching legendaries and a battle frontier-like thing? That's it?
Don't get me wrong the game it awesome and all, beautiful cities, loveable character cast even if i had my doubts before the release, character customization, you name it. But somehow.. it feels lacking. No, something between lacking and empty. Dunno how to describe it.