It's a pain to have such negative, hateful companions. Laezel and Shadowheart are too useful not to have around, but they are complete pains in the butt. The game revolves around doing quests, but any time you help someone they disapprove.
I'm not saying we should get all Lawful Good helpful characters. I would like a chance to motivate them in a more alignment-specific way, especially if I have high Charisma and skills like persuasion or intimidation. It ISN'T the case that only good-aligned characters do quests. Motivations can vary: greed for money or loot, gaining faction affiliation, gaining intelligence on the area, etc. We should be able to play on our party's motivations to keep them on side.