I'd actually like the option to keep a Pokemon's devolved look even after they evolve, on an aesthetic level. It may break the game's "canon" or whatever, but it would make a neat graphical option and allow for more team customization instead of having to only use fully-evolved forms if you want to get anywhere. I would LOVE to never see Dragonite again and use Dragonaire without handicapping myself, for one example.
I still don't see what people have against Dragonite. I know it's completely different from Dragonair, but i like the good old yellow Dragon by myself. People complain too much about it, to be honest. After 6 gens, i thought people would finally accept him. =/
I was just using him as an example, there are others. Kirla>Gardevoir, Roselia>Roserade, Pikachu>Raichu, etc. etc. etc.