ESPN FPI rankings of the 5 G5 champions.
46 Boise State
71 Miami (OH)
So much for the highest rated G5 champion. Liberty did not play a P5 team and doesn't have any P5 on future schedules until 2027 when they start a three for one with Virginia Tech. So they aren't going to amass a well regarded schedule but they do have a softer path to undefeated.
I suspect had NCAA not imposed the waiting period and JMU had been able to play for the Sun Belt title, being 12-1 might have got them in.
* The Sun Belt champ would have rated higher but the NCAA a few years ago in a potentially antitrust violating manner declared a two year boycott of teams moving from FCS to FBS (note that both Nevada and Marshall had previously played in the FCS playoffs one season and bowls the next). Because of that boycott JMU couldn't play in the Sun Belt title game. JMU finished 37 and whomever won between Troy and JMU would have finished higher than 45.
Midseason firing can be done. It more often than not makes things worse and the list of those going on to win a conference title that year is pretty small, it's less common than converting fourth and thirty or more yards.
Blake Anderson canned his DC and another defensive assistant after a 3-2 start in 2020 and A-State dropped the next five with only ULM saving the remainder of the season from being a complete bust.
My observation over the years is fans tend to horribly over-estimate the state of their roster. Fans do a bit better job assessing coaching than rosters.