Considering they really want to do things right, setting a release date now could really put to much pressure on the dev team. Trust me i really want this game too, but i also really want them to spend a good amount of time in alpha and beta to get everything ironed out and running smooth. with a set release date now, they might have to push it back some, which will just piss players off more then they already are with this game.

under promise, over deliver, something Borderland's Gearbox has done, and hopefully SE can do