Stomach sounds like something Fat should cover, and I wouldn't mind seeing a few costmetic growths, or being grown by some slimes, and such and I do like the hyper growth of some elemnts.
Also legs sorta effects the leg muscles and muscles effect the upper body, with bust effecting the pecks.
So I was wondering what muscle groups aren't being represented here.
And I don't mind a bit of ludicriousness, as the scaling and balacing your stats should be what you use to end with a balanced look.