According to hero, villain is decent. I think he can raise all PP's to protect his hand on this flop, all gutshots as semi bluffs and even air.Why not, hero can pretty much only call with with an A so it's a decent raise with any 2 cards imo.
Hero checks turn so it's up to villain, who can continu his (semi) bluff. I doubt he's betting a weak A there tbh. Ofcourse a set or fh is possible, but I'd expect that to be a small percentage of villains range. I think villains calling range on the turn determines wether this is good or bad.