That collection of guys did not become a 85 Bears level defense
Let's review their dominance "going back to last season's playoff run"
Chiefs: NE gave up 31 points in the 2nd half once Andy Reid made adjustments. Mahomes also overthrew a wide open WR in the 1st half that should have been 7. Either way, Dee Ford lines up onsides and KC is in the Super Bowl and almost definitely wins.
Rams: Goff is average at best, and their best 2 offensive players didn't play. McVay stood there like a zombie and just watched his team get crushed.
2019
Here are the QBs they've played:
Week 1: big Ben with a busted elbow and nobody to throw to
Week 2 : Fitzpatrick/Rosen
Week 3: Luke Falk
Week 4: Josh Allen
Week 5: Colt McCoy
Week 6: Daniel Jones (no Barkley, no TE, no top WR)
Week 7: Sam Darnold
Allen and Darnold are young QBs with flaws. Other than that, the 2019 opposition has been a joke AND also teams have been missing players on top of that.
I'm not ready to crown them the 85 Bears.