I mean... I have concerns.
That one Packers disaster notwithstanding, Dan Quinn’s defenses in Dallas have finished the past three seasons 7th, 5th, and 5th in points allowed. Along the way, Quinn readily demonstrated his adaptability as he moved away from being purely a Pete Carroll Cover 3 disciple (which is what he was in Atlanta) to running a far more dynamic defense. The Cowboys also sent five total players to defensive All Pro teams over Quinn’s three seasons running the defense (Parsons 3x, Diggs, Bland).
Quinn certainly has questions to answer about why his recent defenses so frequently got bombed by talented teams which major in the Shanahan wide zone rushing offense. I’m not convinced that that isn’t a personnel issue with the Cowboys’ roster, though, especially at DT and LB.
I am curious which Cowboys assistants DQ is going to take with him. Last I heard, assistants Joe Whitt and Al Harris are both in the running to be his defensive coordinator.