Hi, FUBeAR !

I have a power rating formula, based on many years of returning production trends.
Offensive change measures each column's traditional returning/loss impacts. These are compared with entire FCS current averages.
The results are then reweighed according to run vs pass ratio. Final result is total offensive power change up or down.
Same with defensive units ratios, whichever squad tackles the most and has more starters. Overall team tackles and total returning starters have more weight.

Offense and Defense rating changes combined give overall FCS rank of returning stats.
The changes go into last season's ending power rating to become the new season beginning ratings (coming soon).
(BTW, next edition will include TIP, transfer impact points for incoming transfer stats.)

and FUBeAR rocks