As someone who bought all the Mass Effect DLC (even Pinnacle Station, the F-Tier DLC for ME1), and as someone who bought every Mass Effect novel just to absorb as much of the universe as I possibly could (including Deception, and we all know how that turned out), I must say I cannot even bring myself to get even a little excited for Mass Effect DLC anymore. The ending to ME3 really did sour me to the franchise that much.
I will still probably watch the story scenes of Leviathan on Youtube, but that'll likely be the extent of my interest.