You did not give a reason to ignore the fantastic job the D for the first 56 minutes of that game.
And more important, it wasn't only the D that didn't close: With 6:53 left the Packers went three and out and punted the ball with 5:22 left.
3 plays, 6 yards, 1:40. After the INT the Packers got the ball back with 5:04 left at their 43. A run for -4. Another run for -2 and a run for 2 yards.
3 plays, -4 yards, 1:12. Seattle scores in 1:43 so with 2:09 left they KO to the Packers. If the Packers recover the game is probably over. Instead Seattle recovers the onside kick.
A couple of first downs on either of those drives and Seattle runs out of time. “Remarkably” when the Packers get the ball back with 1:25 left, they drive 48 yards in 7 plays and make three consecutive first downs on that drive – worth 42 yards - to score the FG. One or two of those play calls with that execution on the earlier drives and the game is over.
If Peppers doesn’t convince Burnett to go down the game is probably over – and that had nothing to do with Capers or his scheme.
In spite of being reminded right before the onside kick, Bostic ignores his assignment and botches the play.
So it wasn’t just the D that didn’t close. McCarthy’s play calling
didn’t close. The execution of the O on two consecutive drives
didn’t close. Peppers and Burnett
didn’t close. STs and Bostic
didn’t close. I'll say it again, there's no reason to ignore the great job the D did for 56 minutes of that game and IMO you have to ignore reality to blame only the D for not closing.
I like that McCarthy is taking charge of the entire team. It is certainly to help the STs - perhaps he would have alerted that unit to watch for the fake FG. And it is certainly to help out the D, reportedly including giving them a QB's perspective. But it should also help him see the big picture and put the game away on offense when the opportunity arises. You're right, Seattle fielded a great D, but the Packers fielded the #1 scoring offense. All three phases of the Packers team didn't close at Seattle and I hope McCarthy gave up play calling with all three in mind.