Hexin' Wishes
Diva Extraordinaire
I had a problem with it until i realized just how many Pokémon there are already.
Very true, but personally, I consider them to simply be the next level of forme-based changes which is the direction they've been heading in.
The way the developers undoubtedly see it, and the way I see it is that, even though it's a new feature and they have the same dex number, Mega Evolutions are in essence a new Pokémon.
Think about it:
Brand new designs
New types, stats, abilities
As such, when you add the 30 Mega Evolutions to the 71 new Pokémon, you get 101, which is just above Gen 2 in the amount of Pokémon.
Now I know they technically don't count, but they definitely factored into the developmental and design process as well as working out balance as new Pokémon.
Very true, but personally, I consider them to simply be the next level of forme-based changes which is the direction they've been heading in.