I'd sooner ask for a system as Phantasy Star Universe had, where proportions were near totally up to the player, and height was connected to apparent age resulting in changes to various tertiary attributes.
Certainly, while I think more control over the character's head shape would be nice, I think it's rather stupid to force our characters to have different builds based on the shape of their head of all things..
Though I have to admit, I've seen nothing wrong with the character proportions so far, for my part, and I'm pretty sure if things were made 'beefier' I'd find it more than a little unpleasant.