The Defense is getting better. For some reason people simplify things and act like Quinn and Zimmer are miles apart. People quickly forget how Quinn’s D looked when
1) the offense couldn’t get a two score lead
2) played against teams COMMITTED to running the ball.
They looked just as bad.
TODAY , the offense is mediocre AT BEST. Teams are not threatened to get into a shootout so they can run the ball with impunity. Add to that Zim has been gifted with an undersized DE in parsons, mediocre DT in OSA , statistically the worst NT in football in Mazi. DLaw is out, Sam Williams is out, and Fowler+Armstrong left in free agency.
So the defense looking the way they do is a tribute to Zim considering Quinn’s defense with a better situation and better players folded.