Minthara, a companion we can only obtain by going pure STUPID EVIL. I understand wanting to give players reasons to RP both as a good guy or as evil or as someone in the middle.
Not only you get nothing by siding with goblins and lose on quests, content, etc. There is 0 logical reasons to do that, RP and gameplay included. Unless you are doing solo evil durge run, there is no reason to side with goblins.
While I can understand why Minthara and Halsin are mutually exclusive right now, it's setup in such a way that feels "lame" to put mildly.
Here is an idea, we convince Minthara to leave, knock her out, etc. Anyway, she ends up in ACT 2 the same way she does.
Let’s assume we take Halsin with us, we rescue her but she and Halsin hate each other, similar to Lazel and Shadowheart. In the camp we get them arguing and the two can turn towards you for choosing between either of them. You can persuade them to step down.
Later Minthara tries to kill Halsin and the two end up in the same spot, forcing you to choose between the two of them. Anyway, this time there is no persuading them to step down, you have to choose a side. In any event, one of them leaves camp, but you could possibly find them later in the playthrough.
Hell, have Halsin appear at Last Light Inn and you could still do his quest, but he would not join your party as long as Minthara lives. And Vice versa. There, a proper choice, not murderhobo way of stupid evil.