Destil
Explorer
Hide Armor Expertise nerfed into near-oblivion.
Orb of Imposition needed to be weakened, but this is too weak. It should have let you impose the penalty to one saving throw, after it was rolled, as a free action.
Hide armor expertise is a bit worthless now. This also throws the swarm druid firmly into the 'AC scaling issues' camp, though their scaling DR isn't that bad. Str/Con barbarians never had that problem in the first place (see chainmail).
Orb, I think, DOES do this now. It's a free action, so you should be able to use it anytime, including in response to seeing the roll.