Well, that's your opinion. I haven't been bought by Bioware (or I don't know about it) and still enjoyed Dragon Age 2. I even thought it was much better than all previous Bioware games (except Mass Effect 2, I loved it). I think that plot, characters and dialogs in DA2 was nearly as much good as in Obsidian games. Nearly...
Subjective matter, man. While I think that DA2 should have more critically reviews due to it's horrible graphics and design, I still loved it. Great experience.
Dungeon Siege is a little bit simpler than Dragon Age, there's no team or creating your personality, although I like it too. It has a great gameplay, which DA2 hasn't.