I'm kinda meh on most of the in game costumes, and I can't stand to look at my gear sets anymore.
There are some decent looking disguises (ex. BOODTHORN, HOLLOW MOON, etc.) in game already, it couldn't take much ZOS effort to make costumes from them right?
Obviously this would make them dyeable which will help to avoid attack of the clones. I'd prefer they be earnable, or at least several included in a modestly priced CROWNSTORE pack. Do NOT tie them to crate RNG garbage. So that there's no confusion, the disguises would still remain as normal.
At the same time off a CROWNSTORE vampire normal appearance (achievable currently while using a disguise).