Sucks losing Quinn but I wouldn't have given him that deal, so I can't blame the FO. There are plenty of options out there, it's just a matter of whether or not they're aggressive enough to pursue them.
I don't think we necessarily need to add another premium edge-rusher though. I'd be fine if we were to bring in a handful of interior rusher types and kind of run a jumbo base package with Lawrence and 3 DT types, something like Lawrence-Collins-Pierce-Wolfe, and then draft a DE/OLB hybrid type who comes in on nickel/dime, maybe along with Gregory if we can get anything out of him.
If we want another edge rusher there's Dante Fowler, Everson Griffen, Markus Golden and I think Devon Kennard could be interesting as a DE/OLB hybrid if our defensive scheme is going to be more multiple than in the past.