It’s funny how little football people know on this site.
Just to put it simply for everyone, here goes.
For Manny‘s defense to work he has to have the right kind of players. Really good ends/D-lineman that can get upfield really quickly, and linebackers that can cover for the mistakes/gaps that this leaves. It’s all about disruption, causing turnovers, and getting the offense off balance.
He had that in 2017 and he did not have that the last couple of years especially this last year. If your linebackers are below average in a Manny Diaz coached defense, you're truly fūcked. It wasn’t that complicated. Compare our line and their performance from 2017 and even 2018 to this year. And then compare our linebackers from 2017 and 2018 to what we have this year.
Again, it’s not that complicated.
It all depends what kind of personnel he has at Penn State. If he has the right personnel he’ll make a splash up there.