No idea if this has been requested already (heck, I might have suggested it myself in the past and forgot about it), or if it's already in the list of plans, but I'm going to put it here anyway for the sake of it - better safe then sorry.
I think more races for characters would be pretty neat. There are few obvious candidates, like Rabbits, which are fairly popular, and my particular favorites. Other then races, I think a few more customization changes would be cool too, for example more head shapes for felines in order to look more like lions.