Class act. Wish him nothing but the best. That being said, it was way past his time. Now it's time to rebuild and reload.
Ultimately, his loyalty to his friend D'nofrio and his bad defensive philosophy got him fired. A smarter, better HC fires D'oh after 2012 and institutes an aggressive, attacking scheme.
There is zero reason to play a read and react scheme considering the level of talent UM brings in. Good coaches adjust, bad coaches get fired.