Please for the love of god put co-op in the game, I still play baulders gate multiplayer (was playing a lan game last night with a couple of freinds!)
Its the most fun you can have in a game, your trying to talk to an npc and you turn around to find your team mates have started a fight with the town guards and summoned a pit fiend and now you have to run. Its amazing.
Please add it as a stretch goal, I couldn't give you my money fast enough!