Quinn loves Lve, said he was his most improved player. Unless he wants a huge extension, strong possibility he will be back. As for NT, there are several free agents that can really upgrade this position, Payne being the best, but Tomlinson and a few others can fill the need. If they wanted to address this inside the draft, there are a few options as well.
All indications this is going to be a heavy offensive draft for the team, where maybe just Corner gets address with a high selection. They are going to look to upgrade their OL and offensive skilled positional players. Defense is going to be more about minor tweaks, just about fixing their run D and finding a quality #2 CB. I don't expect them to create additional holes on the defense letting their in-house guys walk.