Main problem most people have with Evil route is that they see the Good one as "right one" ... -_-
I really wouldn't say that. It's a game afterall. I like that Larain gives us the option to play evil, but the evil storyline just feels to little fleshed out at the moment. There needs to be more, but most of all clearer, incentives to go that path. Right now it's complete insanity to kill Halsin and side with the goblins, since it's hinted many times that he is our best chance of healing. The only reason why it would make sense right now to side with the goblins is if you plan on not getting the tadpole out of your head in the first place, but instead want to learn to control it.
That said, I think there is a lot of potential here. It just needs to be streamlined and made clearer why someone would choose this path, and what's to gain from it compared to the good path.