Skull |
Id say it does not provoke. They are basically just changing a feat. The entry does not specify it as a spell, or spell-like ability. Simply a standard action, most of which doesn't provoke.
I didnt check the hunter entry, but would assume it has the same wording.
That said, I dont know why you would want to switch out feats in the middle of combat. Once or twice, maybe. But I think this is more something to do between fights.