Darnold was shaken last year by NE mixing it up and I don't think he solved it over the summer. Give him and his new OL different looks and I think you can be successful with rushing 4/5 in passing downs. May not want to run blitz given Bell's style but again he has not practiced at game speed with that line so they will not be in sync.
Be aggressive, win the game on both sides of the ball.