Hmm I can never usually think of features or things I want but here's one:
Flip clothing/hair models. Like, you know how sometimes hair parts on one side or a piece has an asymmetrical look? Well, how about the option to flip it to the other side?
Hair parts on left? Flip to part on right
That random hanging belt on that one piece of gear? Flip it to the other side
Just something I was thinking of right this second while drawing...