I keep hearing how Miles is a great recruiter, and that cannot be denied. What he does with that talent, or the evaluation of the prospects he chooses, however, is a different story.
I provided an AR2 regression structure on recruiting rank and offensive rank for the top 120 teams in college football over the last 4 years. The AR2 structure was determined from a backstepped algorithm to determine the best fit on the lag in the residuals.
As you can see a drop in recruiting rank corresponds to a drop in offensive production. Yes, some teams do better and some worse. Most of the teams that had better offensive ranks with bad recruiting classes come from generally smaller conferences.
I provided LSU in the purple, Alabama in the red for a simple comparison. Although both fall within the prediction interval, the 95% CI shows that Alabama over the same time span has been able to do far better than LSU with the talent they are given, based on a model of all teams in FBS.