It has been proposed that the reason the Ravens have maintained a certain playbook or offensive philsophy is more Harbaugh's fault than the OC. It seems clear that the OC does not have free reign to do what they do despite Harbaugh's lack of experience on that side of the ball.
We've seen issues crop up with strong personalities of the players, and it's possibly that also happened with coaches (I'm thinking Hue Jackson mainly), to the point where we jettisoned everyone who was outspoken except for Suggs, who for the most part is outspoken touting the company line.
Is it possible that Harbaugh won't allow an OC with a philosophy, a plan, and experience to come in because it challenges his authority? We can gloss over the mutiny as a turning point last season, but perhaps it's a sign of deeper philosophical problems in the organization.