I don't think USF would give you that much better of a hold on Tampa. I know it's not the best representative of fandom, but the NY Times map doesn't even have USF in the top three for Tampa/St. Petersburg/Clearwater. It's Florida and FSU with at about 25% each with others (Miami, OSU etc) about 7%. I guess they could, but I'm of the opinion they don't. I think FSU and Miami give you enough.
There is no college team that can totally capture NYC. It's a hodge podge of schools with Syracuse, ND, Michigan, PSU, Rutgers, UConn, Florida and even Oregon represented. So many people move there from other areas and bring their fandom with them, Temple doesn't even register. With PSU such a presence in Philly, Temple barely registers.
UConn is the last true available piece left in the NYC/NE corridor. Temple, UMass, Buffalo and, if they ever build their football program to compete in FBS, Villanova could all be considered, but they are much more of a work in progress than UConn, Syracuse, Rutgers and BC were/are. If the ACC wants a greater foothold in NYC, the only consideration is UConn.