I wonder just what it would take to convince you that MAC is a good HC? Have you looked at Colorado State the few years before MAC and then at Colorado State after MAC? MAC took a loser and turned them around. Georgia was the hands down favorite to win the EAST in MAC's first year and Tennessee was hands down favorite to win the EAST last year ...... but MAC won it both times. That seems impressive to me.
In the context of the time, it's not so impressive. Mac may well be a VERY good coach. I'll say he's 'decent' at this point.
But look a little closer (and this is 81's point):
2015
He beat a 5-7 UK team by only 14-9.
Tennessee collapsed in the final minutes and gave UF a game they'd been dominated in early.
He beat 4-8 Vandy, 9-7
He needed overtime - I repeat, OVERTIME....to beat Florida Atlantic
He was 2-3 against teams with double digit wins, losing two blowouts where his team scored a total of nine points.
2016
Scraped by UMASS
Collapsed with a huge halftime lead against Butch Jones
Beat 6-7 Vandy by 7
Got creamed by a mediocre Arky team
Beat LSU due to some lousy play calling by LSU
Once again got manhandled by both FSU AND Alabama
He was 0-2 against ten-win teams, with two blowout losses, making him 2-5 vs double-digit winning teams.
He's 19-8 and with just a play going the other way in the one score games he'd be 13-14.
Indeed, without the natural talent Florida gets due to their name, he's probably worse than that.