I'm not sure that we should be making any significant moves at this point considering that we'll likely be using Biermann, Maponga, Massaquoi, and Umenyiora as OLB's in the 3-4. ILB's will be Worrilow, Bartu, Dent, and Shembo. Right there, that's 8 LB's, leaving 3 of our draft picks in limbo.
In terms of DL, we have Jackson, Goodman, Matthews, Soliai, Babineaux, Peters, Jerry, and Hageman. That's 8 on the DL. 16 players between LB and DL. It would seem to me that we're already going to have some significant issues with getting our roster down to 53.
For reference, we carried 14 players between the DL and LB squads last year.
The 3-4 changes things. You can never have too many LB's. The Falcons will sign a vet, sooner than later.