On the OL side we lucked out into premium players who coalesced quickly into a great unit.
On the defensive side I think we probably sign a second tier DE, invite Spencer back and look for a premium pick or two to be spent in the draft. As for DT, I am okay with going with what we have unless a good opportunity comes to get a quality 1-tech. Josh Brent didn't look like the same guy from 2012 but maybe he'll look better after a full offseason program and TC. All the rookies are pretty green but there is definitely some potential in Bishop, Coleman and Whaley. Maybe Boatright will do better at DT with a full offseason to work on his strength than he did at DE.
I think the key will be to find guys who fit well into Marinelli's scheme who may be mis-utilized elsewhere right now. I really wonder if Brandon Graham wouldn't be a really good DE in an aggressive scheme like we are running.