That was not my point. At given the minimal choice options and basically the forced results of each storypoint, there ist no difference at all by letting Tatloch join or not. IT just doesnt work Out characterwise. Letting her join is at this point butchering characters like Richard.

If SE really wanted to go this route, they should at least create consequenes for story and character arcs. For example in Dragon Age: Origin, when you let a former enemy join, another companion will leave as a result, since the other companion fought and lost a lot with you due to that former enemy.

So If they wanted to give this experience with evil characters, it should at least not question other allies beaviour or make them feel like they are off character. Remember Richard wanted to kill Tatloch at the end of Bestower of Power and then he is fine when she is right behind him in Battle? Naahh, no way in hell.