Just my two cents...
Main assumption;
Trade Wilkerson for a 2nd and 3rd pick in 2016.
Skrine is re-upped by guaranteeing more of his $$ in 2017/18 and possibly adding a year on the back end. He's young enough and Bowles loves him.
Cuts; Cro, Giacomini, Cumberland, Kelley and Winters saves $17.1mm
Restructure: Mangold, D'Brick and Skrine saves $10.5mm
Re-sign: Harrison, Fitz, Powell and Ridley costs $19.5mm
With a cap number of $155.3mm and our current number at $138.5mm minus $17.1 in cuts and $10.5mm in restructures minus the $2.5mm in carryovers plus $19.5 in re-signings leaves the magic numbers at $27.4mm under the cap.
Free-agent signings;
M. Schwartz, OL for $6mm
B. Irvin, OLB for $3.5mm
D. Travathan, ILB for $4.5mm
L. Miller, RB for $4mm.
Draft;
1st round; R. Ragland ILB
2nd round; J. Spriggs OL
2nd round; K. Correa, OLB
3rd round; W. Redmond, CB
3rd round; S. Tretola, G
4th round; J. Allen, C
Summary
Yes, Mac will be giving up his best defensive player (by far). However, if the goal is to become younger and faster this is the best blueprint to make it happen. If I'm Jacksonville or Oakland, I would be thrilled to get Mo for a 2nd and 3rd. You get a young very solid OL in Schwartz, a young ILB in Travathan and significant talent through the draft.