I'm glad they didn't make Coach T into a complete idiot.
He does have a tendancy to put too much trust into Buddy, so the way that all shook out was in Coach T's character. He didn't quit just because Buddy said it would be there, but because Buddy told him it was a done deal, he was fired that day, etc. Subtle difference, to me.
Old Hardass Coach is going to get on with a school in the state, meet Coach T at State and kick the Panthers' ass. This will set up the town for a "we should have kept the other guy" hatred for Coach T because they are a "what have you done for me lately" lot. Just a hunch.