Larian needs to introduce a compelling reason why you would side with Minthara and the goblins.
To be fair, there isn't a compelling reason to be good or evil from what I have seen. Tieflings aren''t your problem, and they have nothing but their sob story to give you. Goblins aren't really your problem either, because they aren't after you. Halsin does seem like the best bet, until you find out there is a good chance he might be dead, and there isn't a compelling reason to believe he is alive. So, in the end, the choice comes down to choosing the winning side or the losing side in a conflict you get swept into anyway.
