I don't think the pink and purple will hold him back. If anything, it will only make people hate him more and more, as them being uncomfortable with something different, he can then call them out on their inferior minds and berate them.
I just...I can't see him as world champion with pink and purple tights. I don't know if I can see him as world champion with this gimmick either, unfortunately. If you stripped him of those things, not that I want the gimmick gone, I'd love to see him main event with this gimmick, but I'm unsure of if WWE will let this gimmick be a main event gimmick, I'd say he'd almost be a surefire world champion unless he fucked up.
Pink and purple, though? It's so goofy. Yeah, people might give him more heat, but success is predicated on what Vince thinks, not the audience. And I think he's great enough on the mic that he doesn't need a crutch to get heat. His gimmick is that he calls the crowd morons. How hard is that to get heat?
I feel the complete opposite. I don't like the pink trunks and purple knee pads, but I like the white boots. Gold wouldn't suit Sandow in my opinion, and Del Rio has the gold look going for him. Gold symbolizes wealth and Sandow's character isn't of a rich guy like Del Rio. His attire is bland, but I guess the pink and purple makes him stand out a bit I guess, but I don't like it. His attire is only thing I dislike about him. Everything else is awesome about Sandow.
He said the gold would be replaced with white. I don't see why it wouldn't work with different tights and knee pads. Plus, Sandow's gimmick may not inherently be a rich guy, but it lends itself VERY WELL to using elements of upper class society. They could put some more of that into his gimmick, an Ivy League background, something. It's not like it's unbelievable with this gimmick. The one thing where I think WWE screwed up is they didn't bother to explain how Sandow got to be so smart. We don't know where he's been, we don't know if he's an Ivy Leaguer, a crooked professor who lost his teaching license for banned practices, etc. He's just....a really smart guy, like Del Rio is just a really rich guy, but it's not a fabric of who he is as a performer, like it was with Ted Dibiase, where he'd bribe people and shit.