They're getting pressure on the QB. They just have bass-ackwards principles on the backend. They play outside leverage 7-15 yards off the LoS. Slants, crossers, and, hitches, are always open due to this style choice.
This isn't a this year problem, either. The is what they started doing since showing Richard the door and made the switch to Norton.
Opposing QBs get far too many easy, pitch and catch throws. Yay, you didn't get roasted for the TD over the top, but you just gave up the easy first down, and can't get off the field to save your life.
The Seahawks have long, physical corners that they should be pressing, with inside leverage, forcing throws over the top where their length can be a factor. If you want to play off-coverage then get smaller, quicker, more agile corners that can play that style.
Until that changes it won't matter who they got rushing the passer. Opposing teams are going to continue to feast in the passing game, regardless, as they have been for YEARS under Ken Norton's watch. This is not a new problem, Quinn can fix this. He played more press coverage in his 2 years as DC, than all other PC-DCs, in Seattle combined.
Quinn was terrible in ATL you say?
My retort to that would be, look at Pete right now here in SEA, a tremendous, defensive head coach who has a terrible defense. Quinn wasn't the DC in ATL, he was the head coach. Those are two different jobs, that require two different skill sets. Gus Bradley was terrible in JAX as a head coach, doing very well again as a DC with the Chargers. Some guys are just good coordinators. Bring back Quinn!
Realistically, I don't see Pete demoting Norton, though. Think about it. He isn't going to walk into Norton's office and be like "I know we're 5-0, but we're bringing in Quinn, so can you please head to the LBer meeting room?"
I mean, that is what should happen. They're on a bye week, which makes it even easier to transition. At the very least bring Quinn onboard as a consultant. But no, Pete is going to continue to ride with his buddy, we're screwed on that side of the ball. The defense is going to keep getting worse like it has been (going on 7 consecutive seasons.) Russ and the Offense are going to have to carry this thing.
There is hope. The 2018 Chiefs were really, really bad on defense and almost made and won the Superbowl that year. If not for Dee Ford lining up offsides in the AFC Championship Game, when they all but had that game won.
And on a final note:
Pete is going to kill his defense if he keeps playing this style. I know he doesn't like it, but they are going to have to play more aggressive, and take more chances, which can potentially lead to giving up more big plays, and TDs. But the alternative is having the defense on the field for 70-80 plays a game, and they all get injured. Pick your poison, Pete.