Ohio has 14 Public Universities, serving a population of around 11.6M people. As far as public universities per capita goes, there are only five states with fewer public universities per capita than Ohio (Iowa, Illinois, Washington, California, and Arizona). I don't think closing schools is the answer.
Eight of the public universities are full FBS Div 1 schools, despite the fact that OSU out-earns everyone else in the state combined. Ohio is a sports-crazy state, and the number of school trying to compete in the small arena of revenue sports is staggering, especially with the giant in the room that sucks the wind out of everyone else's sails. I sincerely hope that there is an identity for Ohio's public schools outside of sports. Akron has (or have had) excellent Engineering, Polymer Tech, Psychology, and Law departments. There are some programs that basically need to be at every university - Education (and all associated traditional teaching subjects), Nursing, and Business.
It might take the University System of Ohio to step in and close or consolidate some colleges within Universities regionally to keep all of these schools viable, but as long as sports are such a major driver of budgets and the conversations on school's viability, I don't see that happening.