I'm not sure how to view this, Either it means the game is almost there and they want to take a little extra time for polish or some extra content. Or it means the game has not been testing well and now they are panicking to make huge changes.
I'm going to go ahead and hope that they're just adding polish to an already good game, That is what's happening right?
I'm sure they aren't making big changes.
With a game this big, even that long isn't long enough for big changes.