I've thought that the lack of depth on the DL was our team's biggest weakness now for quite awhile, and was somewhat surprised that they did not target a DL/DT early in the draft this year.
Needless to say, the trenches are the obvious choice for a couple/few picks at some point throughout the draft in the spring, and I would not be opposed to attempting to trade down and accumulate additional picks much like this past year.
I would have liked to see a stud middle/top tier DL taken in free agency too, but sadly that did not happen either. I felt that it was a buyer's market for several players who'd have made nice choices.