If schools have no interest in playing UD in a 1 for 1, they are not going to have any interest in playing UD in a 2 for 1. Its as much about the decline of available non-conference games and dates as it is the opponent. Power-5 schools dont want to be on the hook for three seasons against a non Power-5 school -- any school, but let alone one like Dayton, St. Marys, Wichita State,
URI, VCU, etc. They simply don't need that much help.
You are overestimating the importance of Power-5 non-conference seasons to consider they need Dayton on their schedules for 3 years. They dont even need Dayton on the schedule for 2. Thats the problem. They can go fishing for far cheaper and less competitive non-cons every year from the MEAC and NEC to fill those slots -- and never have to give up a road game to boot. These schools want a Power-5 road game when they want one. No matter what UD offers, they cannot dangle that carrot and for 90% of these institutions thats the only carrot that matters.
Andy Kennedy was a habitual exception in college scheduling.