Peer evaluation is a crucial part of a good process. Good self-evaluation is even more crucial. Evaluation presupposes some benchmarks. Schools, divisions and departments need to reflect on the kind of teaching they value and expect. Everyone needs feedback on what they do to get better at it.
Good evaluation takes a lot of time.
Resistance to evaluation is often emotional, which is not to trivialize it. If people aren't feeling good, nothing gets accomplished. The solutions, then, need to recognize this reality. Leadership is crucial. At least it gets rid of uncertainty which feeds anxiety.