Solve the O-Line problem in free agency...there are PLENTY of O-Lineman who will be available, at the right price.
Guards: Travelle Wharton, Geoff Schwartz, Willie Colon, Jon Asamoah, Chad Rinehart, Zane Beadles, Richie Incognito, Shawn Lauvao.
Tackles: Eugene Monroe, Jared Veldheer, Branden Albert, Jordon Gross, Anthony Collins, Roger Saffold, Michael Oher, Breno Giacomini, Charles Brown, Zach Strief, Austin Howard, Ryan Harris, Eric Winston, Tyson Clabo, Jason Fox, Will Svitek, J'Marcus Webb, Sean Locklear.
ANY combo/duo of those guys would be an upgrade to Doug Legursky and Erik Pears...but they also like Unga, McClain and Asper. Once that is settled...draft Kelvin Benjamin (WR-FSU) in the 1st round, and then draft Austin Seferian-Jenkins (TE-UW) in the 2nd round. They need to get the offense up to par with the defense, a big WR and athletic TE would do just that, giving EJ 2 big weapons/security blankets.
(*On a sidenote...John Wendling is a free agent, and a ST "Ace" whom Danny Crossman coached in Detroit.)