Yeah, I really like this. It's reform from the ground up. As you point out, supervisors are not held accountable, at least not in any meaningful way, for the misdeeds of those under their command. That has to change. And when it does, police will change.
I know cops on the patrol level recognize bad cops, but they depend on one-another to a degree that makes all but impossible to act on that knowledge. I recall when Justin Volpe was convicted of sodomizing Abner Louima the cop who testified against him was called a rat by other cops on a.l-e despite knowing that Volpe was guilty, there was no gay-sex misadventure.
Systemic change can only come from above, from the immediate level above.