Thought he was a good coach, not a great coach
Very good at developing players, and at coaching the fundamentals. I thought we were always a team that looked well coached. Liked that we were able to develop an identity as a team that was tough and physical and could always run the ball down your throat.
Also thought the questions over whether we had reached our ceiling under him were legit. Passing game was almost always a major problem. Overall talent level didn't seem to be getting better. Most of the time when we played the better Big East teams it looked like we were less talented and while he gets credit for having some success under those circumstances, he gets blame for not changing them. I thought 07-10 we were pretty much the same team year after year, just the breaks fell different ways each year.
I also think that as much as gets written about the challenges of building the football program at UConn, it was also a very good situation. New stadium, new facilities, at a great basketball school. I don't think his job was as difficult as turning around an irrelevant 1-A program. There might have been disagreements about whether we should go 1-A or not, but once the decision was made, there was excitement. And we got to enjoy the benefits of a BCS conference while playing in a conference that was much more wide open than it had been in the past. So his accomplishments get overrated to a degree when people say stuff like "wow, would you have ever imagined back in 1998 that UConn would be playing in the Fiesta bowl, or winning in Notre Dame." Those accomplishments have probably more to do with the changing landscape of college football than UConn themselves. So again, I thought he did a good job, certainly could have been worse, but I think there's a lot of guys who could have pulled off what he did, and some who could have done more.
As far as how he left, my only problem was him calling Maryland his dream job because, I mean, come on. But its extremely rare for a coach to leave in a way that makes everyone happy. They only have so much control over the timing of it. And coaches who leave before the bowl game get criticized for abandoning their team, and coaches who leave afterwards get criticized for waiting to long and putting their school in a tough spot to hire somebody, so you can't really win.