My guess is Nnamdi takes a monster paycut and stays with the team. I am totally against bringing back Nnamdi barring him taking vet minimum on top of what our cap hit would be if we cut him. The guy was pathetic last season, but considering we haven't cut him yet makes me think they're trying to work on a restructure.
I would absolutely try and solve some of the problem through free agency. If for example we can snag Keenan Lewis and Louis Delmas (injury history will prevent him from getting much money) then it would aleviate "having" to solve these problems in the draft. Both Lewis and Delmas are still young, thus worth going after.