Again, I'm not sewing seeds of doubt or discontent, but Bud Carson was an EXCELLENT DC, and yet he turned out to be a pretty bad coach.
I'll grant you that there are a lot of excellent coordinators who sucked as HCs.
However, CGC has already proven he's not one of those because he didn't suck at Temple.
I also expect us to eventually be very good in the areas where CGC has experience (D & Special Teams) unlike others who specialize on a particular side of the ball but turned it over to a coordinator who sucked (eg, O'Leary & Ted Roof).
Also, CGC's D has been good at 3 different schools.
So to sum it up, there's reason to be optimistic about CGC succeeding because:
1- He's had some previous success as a HC
2- The side of the ball he specialized on didn't suck while he was the HC.
Building a program on D and Special Teams can get you a long way down the road toward winning.