Pokemon is really just filled with a bunch of "one/two steps forward, one/two steps back" issues all over the place, across all aspects between gameplay, characters, story, interface...
For example, I like how the bulk of the trainer battles get the official Yusuke Ohmura art now, but I miss the animated sprites a bit, since everyone got them in B2W2, and now it's only the select few that have the animated 3D models (and don't get me started on why grunts got them in XY but the CHAMPION didn't; thankfully they at least fixed that for ORAS). Also, because they were still using the sprites, they had the fun stuff like the leaders stepping in with mid-fight dialogue, which made the battles feel a lot more alive... but with the 3D battle environments now they can show unique settings for important battles, which does its own part in making the battle feel like it's actually taking place in the game world...
Given enough time I could probably fill up a few more paragraphs using just stuff off the top of my head from XY/ORAS despite not playing any other games in the series for three years prior.