Eh... I don't really like the "form
e" idea. Deoxys is good with it, same for Castform, Shellos, Burmy, but having Shaymin and Giratina have version-based forms just like Deoxys is just being uncreative.
I liked the addition of Leafeon and Glaceon, never found it pointless. Though, I did find it very strange that more than half of the Pokemon, DP added, were evolutions/pre-evolutions.
I wouldn't really mind if the 5th Generation added loads of new Unown. They seem to be a group separate from the group called Pokemon.
But, I would mind if they were very lazy and only added Pokemon evolving to or from already-existing Pokemon. They'd be ruining the good idea that is Pokemon, because many Pokemon have enough evolutions and are fine with them. I'd believe it to be justified to make Pokemon fan-games and get people to stop playing the official 5th and so on generation Pokemon games.
I miss whoever artists they had that created the RBY and GSC Pokemon. Hey, if they wanted, I bet they'd create Mewthree, which seems way better than some evolution of Electvire. After all, Mew and Mewtwo aren't direct evolutions, but can be a good part of a Pokemon RPG's story. And they were pretty interesting in RBY. Mewthree would continue on that story, and make the Pokemon games a bit more about Pokemon, and not too much about battling. (No offense, to those who are really competitive about Pokemon.)
End of my looooooooooooooooooooooong rant.