After the dismissal of Coach Pruitt, we lost a lot of our best athletes off the defense. Coach Banks inherited lack of depth, and players who had been recruited for a different defensive philosophy. Reality says, what he and his staff have accomplished so far is outstanding!
It won't be until the 2025 season that we will likely see what the ceiling is for Banks' defensive philosophy in relation to Heupel's offense. But we should see improvement each year, as he keeps recruiting players to fit what he intends to do.
In fairness, we do not know how much of what we have seen so far is what he intends to do, or was just the best accommodation to the player skillsets he had available.
But I'm of the mind that what we've seen is philosophically indicative: shut down the run, create TFLs, and force more pressured pass plays because they yield more turnovers. Allow the offense to build a lead that forces teams to play one-dimensionally in the second half, and force more turnovers. We'll know it's clicking when we see us winning more games by 20+ points.
Injured and recovering players in the spring of 2022 produced relative inexperience in the secondary last season, forcing us to play more bend-don't-break defense against better offenses. I don't think we will see that this season.