As for the decline in enrollments, I've said it before: have the state cap Ohio State's freshman classes to 6K. The state will need to give them something in return, but you get at least a thousand pretty well qualified students for the other schools to recruit.
OSU's classes were 6k until 10 years ago not counting all the transferring in from branch campuses. OU is capping their dorm capacity at 7,400 beds and a target freshman class of 4,000. Class was over 10% higher this year but they'll pocket the room and board from he extra students I guess.
The divide in the public system is becoming where OSU, Miami, UC, OU and Kent are landing the better prepared and richer suburban kids while Toledo, Akron, Cleveland St, Wright St, Youngstown St are drawing mostly from less resourced districts. To an extent it was always like that but its become more so with the trends of the past 30 years.
Most recently the in-state classes of Miami, OU, OSU, UC were all around 3.7 on the GPA. Miami and OSU are getting boosted up more by the out-of-state pipelines. If they lose that they'll drop significantly in the USWNR rankings.