Another thing I thought about, with regards to the contests, they've made building Contest stats insanely easy in these games. Back in the originals there was a limited number of Pokeblocks you could feed your Pokemon, so you had to make sure each block was blended perfectly in order to perfect your contest stats, and that blending mini-game was pretty darned challenging. In this one it's as simple as "put some berries in a blender, and out pops a perfect Pokeblock".
Not related to battling or anything, and I know Contests are more of a side feature than anything, but it's just one of the many ways they've seriously toned down the challenge factor, for better or worse.