Is the intention that if there's going to be future DLC, you don't want to play the game at all yet?

To me, it seems like there will probably be more units of DLC coming the more of a success the game is proving so far, and that it could keep coming pretty much indefinitely. So if you viewed such a game as "not done" you'd sit out a lot of widely loved new games "waiting for them to be done" for a long time.