I would really like better hair for the female awoken, The pigtails that the female human can wear are so awesome, can the awoken female wear them too? Also can bungie please put in more skin tones for the human female, and the ability to change your hair and markings throughout the game would be a nice feature to add!!
From my experience working at a game studio I would say that any major art related changes are out of the question when a game is in beta. From past experiences a game might go into a period during Alpha where art is locked and only minor changes and bug fixes will be made. It varies from studio to studio of course and could be in a expansion but I would not expect any to be added b4 Sep 9th. (unless we only get a limited selection in beta) :)