I know there has been a lot posted on this and I also want to preface this with I don't believe Harbaugh should be fired but I wanted to take a look at what seperates good from great coaches and what we should reasonably hold as expectations.
Michigan has some structural advantages due to recruiting, even with Hokes last two classes being mediocre by Michigan standards they were still higher rated than the vast majority of our opponents. An average coach could coach most games to a stalemate and win the vast majority of games simply by just not losing to mediocre less talented teams. As a result the actual value of a coach at Michigan isn't determined by win totals by performance against teams that have similar levels of talent or are having a good season. So I choose to look at results vs teams that were ranked in two ways, both whether they were ranked at the time (because that is what makese something a big game) and end of season rankings because that is what is probably a better determinant of whether that team was good.
In 2015 vs teams ranked at the time: 3-2, vs teams ranked at the end of season 2-3
In 2016 vs teams ranked at the time: 1-2, vs teams ranked at the end of season: 3-2
2017 is still incomplete but to this point 1-2 vs teams ranked at the time.
So to this point Michigan is essentially .500 against teams that you look at to determined whether a coach is a good recruiter or actually a good coach. with a 5-6 record against teams ranked at the time and 5-5 against teams ranked at the end of the season.
In comparison here was Hoke's performance agaisnt the same subsets.
2011: vs teams ranked 2-1, end of season 2-1
2012: vs teams ranked 0-4, end of season 1-5
2013 vs teams ranked 1-2, end of season 1-2
2014 vs teams ranked 0-3, end of season 0-3
So this clearly shows that Harbaugh is a superior coach to Hoke and that Hoke really couldn't coach agaisnst any team they weren't physically superior to. However setting brady hoke as the bar is setting the bar really low. So while we acknowledge it can be much worse than Harbuagh (hence why I started this by saying I don't want him fired) I also wanted to compare him against an eltie coach and look at Saban's first three years. When Saban came in Bama was coming off a previous 4 years of 4-9, 6-6, 10-2, and 6-7. So not exactly a powerhouse and I think a fair comparison in terms of walking into generally superior talent but a bad atmosphere.
2007 vs teams ranked 2-3, end of season1-3
2008 vs ranked teams 3-2, end of season 2-2
2009 vs ranked teams 6-0
So Harbaugh is essentially one year behind Saban and if he can have a good year next year with an experienced team of his recruits would essentially be on the same path. You are essentially 6 inches from Harbaugh and Saban having the same success rate vs ranked teams through 2 years. This year is obviously dissapointing but assuming it is a blip Harbuagh has performed relatively well vs ranked teams to this point. Hope this calms some people down. Next year is a big year, I think Harbuagh has earned this year as a mulligan.
Also beat OSU.