And I think Marinelli understands this more than fans think. For him, it's about priorities, though. Finding a 3-tech in this defense is first priority. Finding a passing rushing RDE (in our case, it was a pass rushing LDE last year) is the next priority because pressure makes the defense go. WLB, MLB and a top-notch safety are next.
If you've got that (which I believe we do, other than the top-notch safety, and there could be some hope for Woods there), then the rest of the pieces are supplemental if we're playing Cover-2. If we're playing more man, then the corners move up in importance. However, I feel that we've got the makings of some good corners.
To me, if we hold on to Lawrence and Irving, then we're in a good position to add that supplemental NT piece that will enhance the 3-tech and DE spots. If Charlton steps up at the other DE spot, then you've got a line that will make things a lot easier on the linebackers and the secondary.