User blog comment:LilyheartsLightning/Citadel and Reckoning DLC announced/@comment-1786741-20130221185148/@comment-1786741-20130221194813

Which are things that should have been the main game. The reason ME2 didn't have a lot of story based dlc is because it didn't leave many wholes or questions that needed to be left open. You played the main game, everything afterwards save for arrival was just optional.