Wow, really cool body design.
Like feylya said, I think it would look better if the cutout on the rear was basically turned around and placed on the lower part of the body. That way you could use it as a place for your input jack.
Also, in my opinion, the lower bout should either be thicker (like you said), or I think it would even look cool if it were shorter.
Excellent design though, don't get me wrong.