It's hard to win consistently with sub-par talent in C-USA and the Big East. Leavitt has built the USF program from nothing to a top 25 team. and by nothing, i mean they didn't have a football program until 15 years ago. ECU has gotten better under Skip since he took the helm. No doubt if he had better talent to coach, he could really build a great team.
And take a look at S-Car athletics. They don't have the facilities that we have here, they don't have the fan base, they don't have the big donors to help upgrade their stadium. Not to mention, SC isn't crawling with talent to begin with. But who would want to go to an SEC program that has poor quality facilities, a less than stellar fan base, and a program that doesn't put much of an emphasis on winning? UTK is light years ahead of S-Car in all of those categories. My guess is they banked on the Ol' Ball Coach to be enough of a draw to recruit, neglecting the things that 18 year old football players want.