So they have to come up with a way to bring him 'back', and Ta-Da! Clones! Now this time it seems clear that they are expecting to finish this story in either DLC or another game. Then it becomes the top grossing SW game ever, and a sequel is demanded. So the original plan was to have him die.
In fact, I don't think they even expected to make a sequel. Click to expand.Well they kill him the first time to wrap up the story in case there was ever a sequel.