I have been way more than impressed with how much FREE DLC EA has released for the Mass Effect 3 co-op mode. Constant weekly improvements, free characters, free guns, free maps, free game modes, and truly listening to the community. While I usually cant stand EA, they truly impressed me with how well they are supporting the ME3 co-op mode.
It reminds me, they also put out quite a bit of free dlc with Burnout Paradise. I think a lot depends on the developer too. Bioware and Criterion seem to be generous with their free dlc. But the most free dlc I have seen from EA has easily been for the co-op mode in ME3. 👍