Dissent :-)
I think in the big picture it is fine to try DPoS against PoW because the market will tell us which is right. In the small picture we don't want to waste so much value in running that experiment so we really want to get it as right as possible. But even then, there is a potential benefit: if we put up the first governed & open chain, there will be enough people who want that over an ungoverned open chain that we'll attract an audience.
The big thing about using DPoS is not that it changes the nature of the interactions but it returns the mining tax back to the community. We don't have to pay for mining! That's 4% bounty right there, or 11% if you're into Ethereum. That's a powerful amount of money, and it is what drives the ability to deliver free transactions as well as pay for development and other things. However it's done, that's the big transfer we are looking to effect, and the game theory aspects of mining have to be near perfect to fight against that.