Am I the only one who thinks that the Mega Evolutions are a little too overhyped? I think that some guys desperately needed new evolutions, yeah, but some of the other choices that Game Freak has chosen I feel are too overpowered or just not needed. For instance, I feel that Mewtwo did not need two different forms, or Garchomp needing an evolution. From a competitive stance, I'm not liking it, but from a regular player stance, I think it's certainly a unique idea.
I also think that because of these Mega Evolutions, the newer generation of Pokemon, sans starters, are not getting enough attention. It'd be a stray reveal, and people get excited for a second, and then they just seem to get buried.
Overall though, I feel that this game has had a ton of effort put into it. I think that they're really trying to make it great this time around.