The o was not good in the second half, I'm not disputing that. But part of the reason was the circumstances it was put in. In the first half they had scoring drives of 70 and 60 yards. Without Rodgers, they have to be given multiple opportunities in good situations to be effective. That means the defense will have to come up with stops when they have the other team backed up in their own end (like 1st and 10 at the NO 14 when GB had the lead in the 4th qtr.). A 3-and-out or holding NO to a single 1st down gives the ball back to the O needing only a short drive for at least a FG, or maybe even a TD on a drive shorter than either of the first half scores. It also means the STs have to do their jobs and give the ball to the O in good position, like the 40 yard line instead of the 10 because of a penalty on the kickoff. From the 40, a short drive nets a FG and the Packers retaking the lead.

With a one point lead at the start of the 4th qtr, the defense gave up a four and a half minute 60 yard drive from NO's 14 for a FG, and a three and a half minute 55 yard drive for a touchdown. Between those two drives, ST's gave the offense the ball at their own 10 yard line on the kickoff. The net result of those three possessions, two by NO and one by GB was the Packers going from a one point lead to a 9 point, two possession deficit. The game was over. The offense had managed to claw back the lead, and suddenly was two possessions down without having had much of a chance.

The defense gave up scores on every possession in the second half. They started with a 7 point lead and were given back a one point lead in the fourth. The game was there for the defense and ST's to hold on to. They gave it away.