had 19.5 sacks between the two of them. That's a lot to make up. I saw your post about "unpredictability and blitzing" and while I agree that Staley must be given a chance, it's an unknown for me. Would like to see where you read that, so that I can come up to speed (if you recall, of course.)
The other area that may be a drop off is turnovers. I tallied up the defensive stats lost, from Fowler, Littleton, NRC, Matthews and Peters. turnovers and QB hits / TFLs seem to be the areas that will need to made up in 2020. I'd suggest this is non-trivial, and an exposure at the present time.
RFS69