There are only 3 teams that are truly balanced and pretty good on both sides of the ball. To figure this I used the metric of posting above average offensive points (relative to the defense you play) and below average defense points surrendered (relative to the offense you play).
Cold, Hard Football Facts.com: The Truth Hurts
This is one of the best correlations to victory and it is clear as we saw from Denver that though they do well for total score differential it can be exposed vs balanced teams (Atlanta I believe falls into a similar trap the other way).
Rounding figures.
Pats 4PPG+ Offense 4PPG+ Defense (best and very balanced team. Worth nothing their O may be a bit low due to missing Brady 4 games)
Dallas 4PPG+ Offense 3PPG+ Defense (2nd best team this year and though young they are balanced well)
Steelers 3PPG+ Offense 3PPG+ Defense (3rd best team and worth noting their offensive score might be a bit low due to Ben being injured for 3 games clearly)
Worth noting.
Oakland 4PPG+ Offense 0PPG Defense (not balanced and offense looking hurt. This will cost them)
Eagles 1PPG+ Offense 1PPG+ Defense (Obviously still living off early season victories but worth noting they had the hardest schedule in the NFL IMO... Either way goes to show just being okay on both sides is not enough. You need to be clearly good on both sides and they are just average or a hair above and maybe that allows other teams to take advantage of you cause you have no true strength to your team. It is an interesting case study.
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So going by how much we have learned that Balance matters (Healthy Steelers, Pats and Cowboys win at a very impressive clip compared to good point differential but unbalanced Denver/Atlanta/Seahawks).
Pats (with Brady) 9-1 Cowboys 12-2 Steelers (With healthy Ben) 9-2 with 1 of their true losses vs a close game with Cowboys - total 30-5 - 857%
Denver 8-6 Atlanta 9-5 Seahawks 9-4-1 - 631%
This tells us clearly Steelers are a far more dangerous team due to their balance and easily when healthy the 3rd best team in the NFL and it is not close. The question of course is where a healthy Raiders team fits on this as they are not negative on one side of the scale like Denver/Atlanta is but dead even on D. IDK but clearly it is enough to make them superior to Denver/Atlanta/Seahawks.
I do make a slight exception for the Seahawks in this though as unlike Atlanta/Denver at times Wilson can play very well and balance can be achieved. So half the time they are a true elite and the other half an unbalanced but good team. Also they fact they have the chance to be elite on both sides when Denver/Atlanta/Oakland really does not puts them in a dangerous category.
Long story short. If the Steelers miss the playoffs it SHOULD make the path to the SB very likely. So likely I would take the Pats over the AFC field pretty easily.