Yup, I encountered Astarion when I already had both Gale and Shadowheart. They were both just sort of...staring off into space when he had me pinned.
I mean, I get that neither would really be inclined to help out much, but we could at least get a snide comment like "I'm not getting involved."
Also yeah, seconding Gothfather, I doubt any sane person (much less a rogue) would try to pull a knife on a character while two others are literally staring at him.
Overall I'd love to just see more party banter and PCs reacting to things, like how Dragon Age does it.
Because right now it's really only the character who's doing the talking that gets to respond, while the other party members look on with glazed expressions in the background.