Just wondering for customization sake, What if someone wanted a short bulky character or a tall skinny one. Currently it goes like short/skinny to tall/muscular. I'm wondering if it would be difficult to implement something like that. Maybe also make the height slide go slightly higher and lower than it currently does. That way you could make large monstrous orcs and turn a nord or a breton into a dwarf if you made them short and stalky enough.
Only thing I could think it would really interfere with would be the kill cams, if you were too fat and short your limbs may look weird and going through each other.