I would say 8-4 is rather optimistic. Bo has done great to take a losing team in his first year and go 8-4. Kudos to him if he can do it. That is hard to do.
As I am a nerd, I check to see how many coaches won a higher percentage of their games than their predecessors in the 90s or 00's when there was a Big 12 North coaching change... I did not count interim coaches, See results below...
Nebraska 3 Changes, 0 Improved over prior coach
CU 3 Changes, 0 Improved over prior coach
KU 2 Changes, 1 Improved over prior coach (KU went from 4-7 to 5-6 once)
K-State 1 Changes, 1 Improved over prior coach (KSU went from 5-6 to 7-6 once)
Iowa State 2 Changes, 1 Improved over prior coach (ISU went from 0-10 to 3-8 once)
Mizzou 2 Changes, 1 Improved over prior coach (MU went from 3-8 to 4-7 once)
Not saying it never happens, I think I have predicted you will improve, but I am just saying be fair to the guy. Irnoically, over the 4 improvements above, none of he teams improved in a big way. Maybe the North is not a great sample, I know Texas got better after each change, for instance, and actually got good under Mack Brown, and if your talent pool is deep, which it may be, could happen here. Just sayin be a little realistic, you were not very good last year by most standards, and awful by husker standards. 2 of the 4 BC teams were the worst since 1961. So we will see, and best wishes minus one game (and any others if by some miracle you come ALL the way back right away and we need you to lose).