They will have a lot of FA this year so I think they will just plug a lot of those holes. No idea if they keep Lang over Tretter, or keep neither.

I think corner as a priority depends on the development of the Randall, Rolllins and Hawkins. I think they know what they have in Gunter, and he'll get better too.
I would argue that OLB will be a bigger need if Perry and Jones depart. Peppers is good as gone, and Matthews is aging...so they'll need to keep finding guys there.

I could see TE and RB being up there -- hard to say if you keep Cook or move on. Rodgers is a #2 TE and Perillo is a maxed out tryhard guy.
Do they keep Lacy? Do they keep Starks? I think they will use Montgomery as their utility RB/WR guy unless someone falls to them...but if Lacy walks they need a starter.