[Steak]

I think the biggest error people make when creating ideas for prospective evolutions is that they keep the same color scheme as the first-stage starter. Starters rarely keep the same colors when they evolve, with a few exceptions like Totodile and Snivy.
Also people's ideas are rarely innovative, they just take the starter and make it bigger and burlier, and that's usually it. Charmander sprouted wings, Squirtle grew massive cannons, Torchic grew arms...just think people could be more creative with these, since these all look pretty much the same to me.

The art itself is pretty good in some of these, though, although that last pic, lol, there is literally no change to Froakie other than the fact that it's standing on its hind legs.