Iíve fixed some figures with loose ankles by giving them boots from other figures with tight ankles.
Skeletor- gave him Webstorís boots
Hordak Ė gave him Grizzlorís boots (but put the Hordak feet on them)
Tri-Klops Ė gave him Wun-Darís boots
King Grayskull Ė gave him Vikorís boots
For He-Man, the upcoming Snake Man at Arms might be able to help. Itís hard to tell judging by hand painted prototypes, but I suspect that his loin cloth and boots will be similar to He-Man. Assuming they give him Vikorís boots with the new ankle joint, thatíll be good boots for He-Man. If he has Vikorís boots and the color matches, Iíll be picking up an extra one to use as He-Man boots.