Personally, my gut tells me it’s more than just youth. For reasons, discussed in various previous threads, I am skeptical on Crocker. But, it’s a reasonable argument and there will be improvement - the question is how much?
My concern is not only guys being in the wrong place or being too slow or weak. It’s an absence of good coached technique. The angles of the DB and not knowing where the ball is. The DL’s don’t get low enough and don’t fire off the ball.
I could go on but there appears to be a mix audience, based on feedback, regarding the desire to take a deep dive on technique. To Chief you start every play using technique and often end a play with technique. So if your technique is bad - it definitely impacts results.