I read the link given by the OP and I find DAI goal amazing. It is a brilliant idea to go in a lender's path to subsidize the platform and make profit from fees.
I think decentralization doesn't go well with stablecoin. For talkenov more important credibility to the project which it produces.
That is for DAI to prove that it is possible for a decentralized stablecoin to exist in the market, and it seems they are doing great since it is almost 2 years since they are in circulation and operation. In my POV, this kind of stablecoin will survive unless their developers fucked up.
These decentralized stable coins perfectly follows the cryptocurrency idea.
Vitalik Buterin said a long time ago that future is in decentralized exchanges and decentralized stable coins perfectly complement the entire decentralized ecosystem.

Sad thing is there is no absolute decentralization since platform is always created, maintained and supervised by a small group of people.