Nothing gamebreaking just my thoughts on some of the character customization!
I think this is an issue because you now have 4 players in coop who may all want to play the same race/sex. It's a little hard to get into the game if you're 3-4 versions of the same face. Some of the faces are a little unappealing.
Male elves seem to be a little lacking in the amount of hairstyles and faces compared to other races/gender combos.
There also doesn't seem to be any younger looking faces for the human male characters.
Also noticed that most human female players are running the face: 5. Sort of immersion breaking to see 3 of the same person.
Really enjoying the game though. :)