I have no idea how anyone outside of the film room and/or practices can judge the job of coaches who aren't coordinators.
I agree with this in the short term. But you can definitely get an idea of which coaches are legit by watching the pups develop over 3-4 year time frame. This freshman class is performing almost purely on athleticism right now. 2 years from now, we will have a very good idea of which coaches developed there players and who didn't.