Not completely happy with the result, but good enough so that I will continue with this approach.
The belly flap is too big, must be flatter, the butt cheeks could be less voluminous, the knees look wrong… but overall, when viewed from a distance, ok-ish. Also need eyelids of some sort.
Also need to work on the edges of the greenstuff with the plastic, or rather the prevention of those. Bit too sharp for my liking.