Larian also forgot to allow the robbers a Dex save to avoid damage from the falling boulder. (Much like they forgot to allow Grym roll a Dex save, even though the DC of that anvil thingy should be very high. Do Void Bulbs allow a save now?)
I think more often enemies should use the environment against the PC's. We are infiltrating their lairs, fighting on their turf, after all. But I would REALLY hate it if they dropped a boulder on me and my Rogue would not get a Dex save to evade.
