The RCO approach might work. But it presumes that the normal acquisition system, with its multiple layers of oversight, regular reviews and armies of people, is the problem and not the symptom.
It could be that simpler systems can only work on small, out-of-the-limelight, secret programs - and won't accomplish miracles in the face of massive institutional pressure, from Congress, industry and the customer, to deny problems and prioritize the program's survival over efficient execution.