The rush defense has been fine and actually improving. Not dominant by any means, but i would say above-average. They actually shut Bell down(rushing-wise) after a quick start in the first 2 drives.
As far as the LB position....it all depends on Jaylon. Assuming he's healthy next season, you're going to have 2 very talented instinctual 3-down run and chase LBs in Smith and Lee. That should be plenty given most teams play nickel 65%+ of the time now. Additionally you have Wilson who looks solid and improving. And Nzeocha who looks promising. But again, it all depends on Jaylon. If he's healthy before the draft, you put LB somewhat on the backburner, If we're still waiting in April for that nerve to fire, LB is in play very early in the draft.