I agree that the aesthetic is very limited and similar across the game so far. A lot of people have the same exact armor. I don't know how cost effective it will be for them to create different looks or dyes for armor, but at the bare minimum it would be nice to be able to change your appearance somewhat in the game. Nothing super extreme, but hair, make-up, or tattoos. Just in case you regret some of your decisions or get tired of the same look after all the hours of play. It could be something in game that happens like you go to a shop, tattoo parlor, or salon. Or something simple like looking in a mirror.
