Just did something that I think its pretty interesting. So we all know how bad the defense is, but I basically compared throughout the course of the season our opponents PPG and then what we allowed.
What I found was that on Average New England's D allows .65 ppg less than their opponents scoring aveage.
The highest scores allowed over opponents averages were,
Indy 24 allowed vs 15 average
Washington 27 allowed vs 18 average
Biggest variance the other way was holding KC to 3 points vs a scoring aveage of 13.
So I think what this information tells us is that the Pats D is average
Yeah, I think points allowed is a much more valuable metric than yards allowed.
The caveat to your point is that the Patriots were able to hold many of their opponents below their scoring averages because they forced field goals in the red zone instead of allowing touchdowns. That's great, but part of that can be attributed to the fact that for basically the entire second half of the season, the Patriots didn't face a single really good quarterback, let alone an elite one.
One could argue that in those red zone situations, an elite quarterback would have been much more successful in converting touchdowns instead of being forced to settle for field goals.
So, in other words, it still should be very troubling that in so many of their games this season, the Patriots allowed their opponents a great number of trips into the red zone; it could be argued that the only reason they didn't give up many more points and lose more games is that their opponents happened to be very bad at converting once they got there.
Bottom line, I agree that the defense is not as bad as the yards allowed numbers would imply. However, I also think that it's impossible to say for sure just how good this defense is now until they are forced to play against a top 10 quarterback. It will be interesting to see this weekend whether Flacco comes and plays like one (since he's very inconsistent).