Yeah, as far as I'm concerned the obvious option next to Bradley is Mix. He is a creative and disciplined player competing at a... relatively high level compared to others. Jermaine Jones is a bum and he also is adventurous and selfish, which doesn't allow Bradley to get forward. Mix will operate in the double pivot much better IMO.
If it were me I'd play Bradley and Mix behind Deuce with Green and Donovan on the wings and Jóhannsson up top. The defense is a little trickier, but I reluctantly think Beasley is an acceptable option at LB (he has operated there in at least one WC, maybe two if I'm not mistaken), Brad Evans at RB (although I'm curious about Cherundolo's health even at his age), and then Cameron and I guess Gonzalez at CB. My key reserves would be Fabian Johnson (actually I might start him over Green, I just like the idea of Green), Kyle Beckerman, Benny Feilhaber, and Josh Gatt who deserves a damn chance with his pace.