Unless our O is playing badminton instead of football I'll agree to disagree. Fundamentals are fundamentals, making plays is making plays, flying to the ball, tackling well, setting the edge, playing assignments, all still factor regardless of the scheme our D faces imo.
Is it harder to project how well they will adjust to a wildcat, power I, spread etc. Probably to a degree as the overall focus facing some of those schemes and opposing players, will change how we attack.
Fwiw Will has always been in a 3 point stance. So I don't think they are teaching 4 pt as the standard to use. Not trying to make a dig but you often come off as if you know a better way to coach our players and position groups than our own coaches do. Perhaps you could do better than them. But if you aren't working one on one with the players you probably know less about them than they do.