Sounds like there's a couple of scheduling issues. First, the big conference schools will never come to Johnson City, the exception being UT on occasion. The reality is an away game in Johnson City probably doesn't pay as well and makes it a little more likely to get a loss. Frankly, if I was in their shoes, I don't think I would either. That leaves the remaining conferences available; I think we've gotten some quality opponents in here the past few years of this variety.
The second issue is control of the Freedom Hall calendar. I enjoy Freedom Hall as a place to watch a game; however, it sounds like the basketball games have to fit in around other events and basketball may not get first choice. Control is a big positive of a new arena, although at a pretty hefty price.