Have you seen Ganondorf's custom moves. They're awesome. In fact I'll even go far enough in saying it'll make him a very popular competitive fighter. So I wouldn't say "they did nothing about it".
Yeah, the fact that everyone got more colors while Wario got less really pisses me off.
Even little Mac got wireframe versions of all his colors AND his training suit. It would've been NO effort to include those 5 other skins from Brawl. They're not even different textures like Mario's stars&stripes outfit or Ness's Mr. Saturn shirt. They are literally just recolors. I could do that in photoshop. It literally takes me less than 5 minutes.
There. Took no time or effort.
And I imagine it's even easier with the actual texture.