Counterparty risk vs. risk for systematic failure
its the taks of the investor to pick a side
Not only the investor, but also (and more importantly), the user.
One thing I've had trouble reconciling in regard to Bitshares and other decentralized tech is the lack of real Customer Support for the everyday user. It might seem trivial but if you tell potential users that there is no single entity to call or email if they have issues; that's a major turn off.
Customer support will need to be provided by the services utilizing Bitshares and until they are up and running (online wallet providers, gateways, etc.) I think it's very dangerous to market Bitshares to anyone with a limited understanding of decentralized tech.