1) The only really enticing aspect about being evil so far seems to be to kill/steal traders, but story wise? The drow doesn't really offer you anything. Halsin is your best lead but instead you can say screw it and stab people in the back for fun. Afterwards, she just drops you with some info about where you could go next. This path just doesn't make sense. Apparently she can get you in hold of some artifact which will help you reach moonrise towers which doesn't seem to be a part of EA. Now that could be enticing, but it is only revealed after helping her and at this point you don't even know how that would help you to a cure, and you don't really have any other real objective than getting cured. All your party members also just want a cure. It doesn't make sense that the whole party is actively working against getting cured.
The dreams on the other are more interesting. It is literally your dream companion offering help, even giving you powers. This isn't really a part of the evil character experience though. Evil characters should have more stuff like this. Or maybe these dreams should tell you to do evil things in exchange for power. Currently, I feel like it too quickly turns into "I can give you literally everything" and it feels like another scam just like everyone offering to cure you. I don't know if there is more to these dreams than the two I've encountered. As it seems, they're tied to essentially dialog choices which depending on your character you may not want to choose even if you want to embrace those powers overall.
2) The battle at the grove was a horrible buggy experience. Most of the time the tieflings didn't do anything on their turn, just stood there wasting time. Often times, they also got added into the battle from very far and again you had to watch them just not do anything. And even when it was working, waiting for 10 dudes to take their turn running towards some enemy and blocking the way for others was not exciting. Simultanous AI turns would be amazing here, or at least allow speeding up animations. Fixing AI freezing would also greatly speed up the fights. But even if everything is working, it should definitely be considered how to speed up large scale fights, particularly the AI turns.
To sum it up, there was little motivation to choose an evil path and similarly little reward, and the gameplay content was worse and buggier. I do like it that you can do it even if it hardly seems smart at all, but currently the experience is simply lackluster. I can see it developing into something much more after EA, but hopefully they can make it more enticing in some way. Give the players a motive as good as Halsin and the promise for a cure for being evil and make players contemplate what they should really do.