Well, as a start states can start refunding their colleges and universities, to levels that used to be common [until roughly the 90s].

After that, it becomes more prescriptive around roles of operation, and that's murkier. For example, I'd be happy to see hard caps on $ of operational budget spent on admin. I'd also be happy if sports was budgeted for separately and that student athletes were separately admitted to both their sport(s) and for academic study. There are many things states could do that would impact how schools are managed, regardless of the federal government's rules for student loan lending.