Our OL was pretty good in PassPro by the end of the season last year and they return everyone and have a legitimate 2 deep. Plus they are some big MFers.
That said, we don't return very many sacks from a defense that didn't sack the QB very much. I believe Overshown was #2 in sacks last year and he is gone. Sorrell led the team with 6 sacks I think and he should have at least a similar season. Other than Sorrell I don't think we have another DL/Edge returning that had more than 1. Ford had a couple, but he is a LB obviously.
What is needed is for the likes Fink, Tapp, Burke, Vasek, Ross, etc. to take the next step and learn how to get leverage and turn it into significant pressure off the edge.
And as stated above, it is time for Broughton, Collins, Sweat, Bledsoe, Murphy to take next step and get push up the middle and control the pocket integrity. Trill Carter is a nice addition and hopefully he can provide some reps and experience.
We have a good, not great DL. Servicable, not elite. We need something between great and elite.