Defensive Line
Dump the we don't need a real 1-Tech philosophy and get some size in there. Don't overhype Terrell McClain or tell us about intangibles from Nick Hayden that don't really matter. Get some beef in there to help out young guys Demarcus Lawrence, Randy Gregory, Tyrone Crawford, and David Irving. Keep an eye on recent addition Mike McAdoo. He was a highly recruited player and spring game MVP at North Carolina before academic issues started him on a path that led to the CFL and the Arena League. Greg Hardy may not be worth the contract or off-field stuff that comes with him. If he can be signed for a reasonable rate, sure. If not, use that money elsewhere.
Linebackers
Sean Lee is a difference maker. Rolando McClain is a good fit in Dallas. They should try to sell him on the security of being somewhere he is appreciated and sign him to a 3 or 4-year deal. They have a few young guys who seem versatile (Hitchens, Wilson, and Nzeocha). I don't hate the idea of adding Myles Jack (#4 seems high for him to me) who is an impact linebacker in the Ryan Shazier and Shaq Thomspon mold.
Secondary
The team's Achilles heel and also the greatest opportunity to improve. It's simply time to move on from Brandon Carr, Morris Claiborne, and Barry Church. Go and get an active safety and a couple of solid corners. If I'm going to hand it a big contract this off-season, Eric Berry is my number one target, assuming he ever hits the open market. Orlando Scandrick and Byron Jones are factors, J.J. Wilcox needs to compete for his job, and everyone else should be replaced.