It's the tiny forearms on Apeface. It was excusable on the G1 version because G1. But I had hoped that a MP version would do something to make them a bit more proportional to the rest of the ape. And as for the dragon, well, that thing has always looked terrible.
Hopefully MakeToys show us theirs soon. It will no doubt be an all round better figure, if less G1 accurate.