it's a decent tech demo, though you forgot to add an ability to add in the crotch and right shin back in manually without the fully body.
Everything other than that is great! Not sure if you'll come back to this any other day, but if you do, i would definitely recommend some accessories like glasses, horns, tails, etc.
Honestly i could see this as a tycoon, game, where you make mannequins according to customers preferences, and can even buy your own mannequin/customizations to have fun with.