Meh I think the "cost of hard fork" argument is a cop out. In the first year of Steem there were... 17 hard forks? And since then there have been 3? There is no good reason to bundle the economic incentives with the DAO, with the exception of the obvious reason that the economic incentives have much weaker support than the DAO and might not actually be approved on their own. Which to me, is the primary argument for why it shouldn't be bundled. A bunch of half-baked measures with a net effect that is hard to predict (some claim - I don't think it is hard to predict personally, I think it is a loss for all users except the very largest users and bid bot owners) shouldn't be slipped through on the back of something with wide support.