Since I haven't been sure where to post this opinion, I'll do it here.
Baator should be about perfection and elitism.
Well, that's something everybody knows, but here are some examples for UP:
Classical music playing everywhere.
Erinyes' arguing about the quality of their implants and hair.
Arch-Fiends who are willing to suck the life out of a small sector of their layer just to get themselves the best limousine in Baator.
We should somehow emphasize how each is trying to out do the other with looks. Like Hollywood gone way too far.
Perhaps it could be possible to improve your position in Hell's pecking order with your looks?
Or more like that you can improve your standings to a certain point, which then in time becomes/became the standard limit for common folk.
Like you aren't any better than a lemure, unless you've gone through every possible surgery and cosmetic.
I'll track it down - I think it's still around somewhere.