Did you considered changing character witdth with character height? Maybe its only me, but every height exept average looks strange.
He Mentions that Changing Character shape is impossible.
Width... I have no idea but if it Changes the model to Much he will need to change every clothing in game, so it might be a No-Go!
Go to the fairy queen for width.
E-hem!
Thicc*
As the Magical invisible totally Omnipotent being Describes it!
Yeah, unfortunately it's a little limited in that respects. Obviously, doing it manually would make it look a lot better, but would also require way too much work