I think there's ample depth on the d-line. There's no chase young there, but they're talented throughout. Smith, Harrison, Friday, Jean-Baptiste, Cooper, and Stover at DE is plenty. Togiai, Vincent, Garrett, Jackson, Cage could all fight for starting positions at DT.
The only linebacker i expect to lose is Malik Harrison and while thats clearly a huge loss, I think there's talent in that room as well. Hopefully Browning or even Hilliard could fill that role while Mitchell steps up in the middle to rotate with Borland.