I'm sure this was already mentioned somewhere, but just on the chance that it hasn't been... hopefully in future updates companions will treat things like the toxic gas rising from the vents in the Imperial Fortress as an obstacle to avoid? I just did a run through of that dungeon and Hirge was driving me nuts by not only charging right through the gas making a beeline for the enemies, but while she was following me, if I happened to be standing close to the vent she'd literally just stand there on the grate until incapacitation. It's kinda funny in a way, but obviously also annoying at the same time. Similar problem with standing in fire when non-flaming ground is just a few steps away.