Increase the amount of customization on the character creator so its more than just the face and hight. This includes proportions, body shape, musculatures, and the nitty gritty so there's more variety and not just a few blobs of paint thrown onto he same model.

Like how all the males are buff and somewhat thicker built and all the females are twigs. So with those listed above you could have a skinny twink male miqo'te or a hulking female lalafell to toss an example out there.