I dug DA2 despite its faults (I love Obsidian games, I don't care if a golden game is covered with shit, I am a master shit cleaner. As long as I get my gold.), but I got all the DAO dlc out of loyalty to Bioware , and they absolutely screwed me on that. I should be pretty annoyed by that too, since Origins was rather disappointing overall, but I gave 'em their shot. Having said that, ALL of their DLC's were pretty crappy. Leliana's Song and Darkspawn Chronicles had some novelty value in how different they were, but still not worth the money or the time for what you got.
Unless I hear this is several hours long (3~4 at least), and very good story-wise, or properly balances gameplay quirks like enemy waves and adds at least a few maps for sidequests to cycle through, I'm going to have to give this one a pass.