I really think 7-5 needs to be the mark to get a 5th season as 6-6 is another year without a winning season (meaning above .500). We should not lower our expectations of a 4-year coach just because the prior 3 were so bad or because the coach was a former player.
I do believe there is a reason we are struggling more with recruiting this year than the prior 3 years with Frost (currently sitting at 73 in 247 team rankings). Recruits are smart and want to play for a winning coach and program. Frost was initially able to sell recruits on being able to turn around Nebraska like he did with UCF, but his record at Nebraska shows that the 2017 UCF team was an outlier. We are doing the program a disservice if we allow recruiting to begin to suffer too. I get that some Nebraska fans are still haunted by the early dismissal of Solich, but in cases where the coaching has been poor, a change at the top can inject new hope into the program with recruits.