I made a forum account just to say this lol. What pushed me over the edge was this:
If you kill Tara, the most you get from Gale is "Tara! No!" and a minor hit to approval. At the very least he should leave the party, maybe have some kind of super high persuasion check to get him to stay. (I felt awful for doing it, but I'm doing an Evil Durge so... But apparently I, the player, felt worse about it than Gale did?)
Other than that, I really adore this game, but the companions do fall a little flat in Act III.