I also don't have a problem with cosmetics, especially in Diablo IV, where it is mostly irrelevant what your character looks like. Even fully zoomed in, it is hard to make out much in the way of details. The only way you can see a character in their full glory is if you'd inspect them but you'd have to be bored out of your skull with the game to stand in a crowd and inspect players.
Besides, say about Diablo IV what you will but they have done a good job at making every character look kind of badass if you tweak your looks a little with the regular cosmetics that you can earn from gameplay.
There are no intentional major fuglifiers in the game that make your character look like ass unless you visit the store. The looks that can be earned via gameplay are more than decent enough and who cares about looks in all the mayhem anyway?
-=Threadcrappeur Extraordinaire=-