I'm probably late to the party, but at least a large portion of the Jaguars defensive statistics are due to the supreme lack of quality among AFC offenses. They thumped the Steelers, sure, but you can pin 80% of that game on Big Ben. The Chargers lost a close game in OT to the Jags, but that was a 1 PM east coast game (historically terrible for west coast teams) and the Rams beat the Jags.
If you toss out the Texans (who played Savage most of the game, and were only good with Watson) the next best offense the Jags have played is the Cardinals, who are the 18th best offense. The Jags have also played the 32nd, 31st, 27th, 24th, 23rd, and 20th ranked offenses. Not exactly stiff competition.
Kinda telling how big the disparity is between the NFC and AFC offenses actually. If my math is correct, the AFC is 18-28 vs the NFC this year, compared to 33-30-1 last year. If you look at offenses, 12 of the top 18 offenses are in the NFC, and some of the 6 AFC teams don't really even belong there (Houston without Watson, KC without whatever magic was keeping Alex Smith alive, and probably Jacksonville lol). One of the four NFC teams not there is the Rodgersless packers. The NFC has all the quarterbacks, and outside the Patriots and Steelers the rest of the AFC is really feeling it.
I'm also not really buying the Vikings, I hope I'm wrong but it doesn't exactly feel right that they are the class of the NFC right now. Only their first and last games (Saints and Rams) were particularly impressive, and I would fade them in both their next two games at Atlanta and Carolina.