Interesting question. I wonder if Quinn had been promoted to HC over MM, would they have kept Armstrong, Fowler and Biadasz? It's impossible to know but I think keeping those defensive guys might have helped.
Quinn seems to be a lucky guy though. He comes to Dallas in 2021 as DC and they wind up drafting Micah Parsons. Parsons turns out to be an immediate impact player on defense, and a game changer. Quinn's defense impresses out of the box.
Then Quinn goes to Washington, and they draft Jayden Daniels at QB. Washington had the 2nd pick in the draft and took the 2nd QB of the draft. He turned out to be a game changer, immediate impact player, and way ahead of the 1st QB taken, Caleb Williams. Without Daniels playing the way he did, who thinks Washington would have had a winning record? I don't think even Washington expected to be where they are this year.