I think you may be assuming that none of the players involved in the attack will be back. I don’t think that is true. This recruiting class may reflect that.
The 2015 recruiting class included 5 linebackers alone. All of them came with very good credentials…..Buskirk, Morrow, Olshanski, Walker and Scott. The latter 2 are not currently on the roster but I suspect will be back in school in fall (although I honestly don’t now for certain).
I hope that allays your fears.