If you believe that the HC is responsible for what his assistants do, then I think he was close on Leach's grade this year. My way of looking at this is that the HC's grade should really be a reflection of the grade that the staff as a whole earns. And bear in mind, I am a Leach supporter. But Leach only seemed to have direct involvement with the offense this year (which did OK). The defense and special (!) teams cost us games. Special teams was a total coaching disaster...I can't put it any other way. Defense was one notch, maybe two, better than a disaster. By no means was it a successful season. Some of that was on injuries. When you can't play the same 4 DB's two games in a row all season (slight exaggeration, but only slight), you are going to give up pass plays and miss some open field tackles. None the less, if the HC is responsible for coaching the team as a whole, I'd have given him a D+ this year. C- would have been stretching it.
MacIntyre's grade at CO was IMO too low, as was Shaw's grade at Stanford. Dykes looked a little too high, and Riley & Sark both deserved their grades...and for the same reasons discussed above regarding Leach.
Mora's grade was a joke. Yes, they had one inexplicably flat game, and that was on the coaching staff. But the body of work for the season deserved a much better grade.
Arizona was the surprise team of the season for me, so I don't dispute their coach's grade.
Bottom line, IMO CML needs to be more involved in monitoring what is going on with special teams this year. I accept the idea that a good DC should pretty much run his own show, but next year CML needs to spend at least a little time every day being more directly involved in special teams, regardless of how he ends up structuring the staff responsibilities in that area. And I hope we can all agree that next year's coaching staff performance deserves an A.