What's given you that optimism? OB appears to be a good old-fashioned control freak. I think he leaves RAC to his own devices because of his reputation/record as a DC and BB probably gave OB a call and told him to let RAC do his own thing.
One of the things I like the most about BB is that he seems to instinctively know how much to meddle with any aspect of his team, players and coaches. When a coach is growing into a DC position, BB doesn't give him the title of DC but lets him do the duties of a DC. When that coach is ready for the added pressure of the title of DC, BB gives him the title. Teflon O'Brien does the opposite. Gives the coach all of the pressure that comes with the title but not the authority that comes with it. If OB wants to be BB, let Tim Kelly game plan and call plays without the title of OC. Approve game plans, help him along the way and take responsibility for bad calls/game plans until he can game plan properly for a "multiple" offense and adapt his game plan for the flow of the game. I think what it boils down to is trust and results. BB has the resume and results that he can afford to take his time with coaches until he trusts them. The coaches see the results and trust BB to do what's best for the team.