I think these are good threads. The ability to analyze the past helps to understand today and the future.
Whether you are into stats or not, there is no question IMO the answer is "yes". Many of the players were highly rated out of HS/juco that would have benefited from being in the same system for 2-3 years and had been recruited for that scheme. Since they pulled a #30 in total D with a less talented and experienced overall roster, there is little doubt they would have been equal or better last season. Then you add in an improved offensive scheme/running game that produced a top 20 offense. There is no doubt in my mind Dools would still be here with at least an 8 win season.
For the record I am thrilled he is not. Horrible game manager, could not inspire a grade schooler, and had terrible relations with virtually everybody. But Chaney improved when Pittman came and Wilcox knew what he was doing with the talent he had to work with, which was improving with Sirmon as his wing man.