So in Dragon Magic, if you were gain heavy armor proficiency from your class (paladin, cleric, fighter, etc), you could instead take a dragon husk that gives you 6+1/3 your class levels up to armor +12 at 18th level. However, doing so meant you couldn't wear actual armor, and you'd have a check penalty of -4 and a max Dex bonus of +2. Also, Magic Vestment couldn't work on it, but it still works on regular clothes, and your movement is as if you were wearing medium armor.
My question is, is there a way around the -4 check penalty and the max of +2 Dex? Getting passed the medium armor movement would be nice as well.