I'm sorry to burst your bubble, but they're already done with the game, as far as I know. From now on till release it's just testing, testing, and more testing.
No....they are not done. They are still polishing things over, testing and adding new content if they feel it needs a little more. They are most likely nearly done seeing as how they announced the release date a year before it comes out, meaning they have confidence that they will have finished the last touches on the game awhile before it's time to go gold and release.