I'm pretty sure buyout plays no role, maybe a very insignificant role at best. What matters is consistent improvement, which both RR and Harbaugh have displayed. And, since RR is currently our coach, why would we exchange him for Harbaugh? Only two reasons I can think of is the violations, and RR not being a "Michigan Man" (whatever that really means). Do those really cause for a coaching change? Doubtful.
"Though I received no official response to these sophisticated and elegant tweets to the Illini Athletic Department, I would like to think that Beckman spent the evening prank calling everyone in Illinois named George McLellan and then ordering an absurd amount of hats off an internet haberdashery to hoard in his home's hat annex."