The thing is that the game could pull it self out on story and art alone, I mean look at PS:Torment. The game play would need to be a lot worse for the game to really tank. The only thing I think will happen with PoE is that a lot of people are going to be disillusioned about it being anything similar to how the IE games played. How bad is that going to hit Obsidian, I really don't know, but a sequel is not out of the question.