2015 was an interesting year, schedule-wise, because the only teams we played from the East were Michigan State and Rutgers. Also, Wisconsin probably had its worst team of the past five seasons.
So schedule-wise it was about as good a year as any for Bo to have finally broken the conference title drought.
Michigan State bested Ohio State to get to Indy. Bo had matched up well against Michigan State.
It would have been cool to have finally broken the conference title drought that year, but I wouldn't trade any of those hypotheticals for bringing Frost in this season. And that's why discussing Bo at this point seems so especially pointless.