I wasn't enjoying the evil playthrough then I discovered something in the under dark which made things a lot more interesting...
I just finished a playthrough where I was pro absolute and to my surprise the story continues in the under dark despite Minthara telling me to go through the mountain pass! Luckily I wanted to continue playing so I went to the under dark anyway and I learned that you can actually talk to the Duergar and learn they are followers of the absolute and you can side with them?! This makes the evil playthrough much more interesting to me, shame the fort is not in early access yet.
In my Good playthrough I helped the Myconids so Duergar attacked me on sight before I could learn anything about them so I thought they were just generic enemies. I had no idea why they had a boat or why the boat took me to a fort but that was all explained to me in this playthrough.
It feels like a waste to have all this really interesting future content when Minthara is going to send you through the mountain pass instead? Why would we go to the under dark instead of following Minthara's orders? I guess the mountain pass route could be interesting too but I think the Duergar fort (if we can help them) is the type content that we are missing in Act 1 currently for evil playthroughs.