I'm inclined to say, if it ain't broke then don't fix it. Ziggler is doing fine, he may not have a unique look but it's quite a traditional one and that works for me. I think the only thing holding him back from rising right to the top is his promo skills which are still not great (but have improved a lot). I like his in ring style even if he is over selling, you can't deny that he makes his opponent look good. The only thing I might change is to give him a face turn.
I think he should go to his natural hair color. I wouldn't say that if it wasn't for the roots showing through easily especially during matches. I personally like the pink but maybe pair it up with black. He could say he deserves those colors more than Bret Hart saying when Bret said he is the best there ever will be, no one could have predicted Dolph Ziggler. Makes him sound like more of a showoff and could start an easy feud between him and tyson kidd over the colors which might be the push Kidd would need as well.
Lose the pink and lose Vickie.
I feel at this point Vickie has been holding him back. She does nothing for his character.
i don't see him getting a tattoo just for a gimmick change
So let me get this straight. This guy is over as a heel and got WWE management to back him up in which they plan on giving a World title run, beat RKO clean, and possibly beat Cena. Now your plan is to scrap everything that made him successful and start from scratch? It's official no one, and that includes me, from the IWC should ever run a wrestling company.
He should get a perm.