One has to be careful when assuming the recruiting has slipped. As Upandin & I have been bantering about, in many cases it's been more about development. No, you can't just take a few 325lb kids from the Milwaukee City Conference & make them into a solid line, but for 30 years now it's been about finding more or less "average" recruits who have the work ethic, desire & attitude and making them into more than the sum of the parts. That's been evident over the years in the front seven & O-line, but it wasn't relegated to that. One needs only to look at the walkons who have contributed greatly, including the new coach.
Big picture, I'm OK with the recruiting, as far as the success rate & how the kids are rated nationally (as far as that goes). The overall development capabilities of the staff, and recognition of who the "right" kids are to fit the culture, that might be something Mac saw as an issue. And if so, that buck stops with Paul & the staff he put together.
I'll be very interested to see how this gets parsed out regarding the responsibilities of Engram & even Leonhard himself. Does Leonhard involve himself in play-calling, and to what extent? Is he still in full charge of the defense? Interesting times.