I think Rivera is losing you. How his decisions affect you personally don't translate into the locker room.
The common denominators in all the games we have had poor showings in: The 3-4.
Which says to me that at the very least, Shula is incompetent against the 3-4. Which I think is an inexcusable weakness in an NFL offensive coordinator.
I know it's not as simple as pinning it all on Shula - the players have to execute. But when the entire offense fails to function against all three 3-4 defenses we have faced, the head man has to be held responsible in some way.