The current system doesn't need a lot of tweaking. The only thing that should be changed is to award the homefield advantage to the teams that have the best record, regardless of which teams are Division Winners. Many are advocating removing Division Winner as an auto-qualificaion for the postseason, but I don't agree with this. The 4 Division Winners + 2 Wildcard teams in each Conference is a good set up, it's just when the seeding process starts the the NFL has itself wound in knots.
My initial question to having the team with a better record automatically getting a home game is this. Would your opinion be the same if TEAM A went 11-5 and won their division but played 10 playoff teams and went 8-2 while TEAM B came in second in their division by going 12-4 but going 0-4 losses against playoff teams?Sometimes a team's non division schedule can be very easy or incredibly hard. Would you have rather faced the NFC West or the NFC South this year? Couldn't that have played into whether a team got some easy wins while another got a couple tough luck losses?It will only get more difficult when they move to an 18-game schedule. If I were to guess, they might set the schedule up as follows:6 games in your division (like it is now)4 games against another division in your conference (like it is now)4 games against another division in the other conference (like it is now)The change would be eliminiating the two games against conference teams that finished in the same position as you (say third place vs. third place). Instead, I suspect that they will add in 4 games against another full division in your conference. So as an example, PIT might face the AFC North teams twice, the AFC East, the AFC South, and NFC East as their schedule. But the Jaguars might face the AFC South teams twice, the AFC North, the AFC West, and the NFC West. IMO, those two schedule would be pretty different in terms of difficulty, but JAX could have more wins than PIT in this scenario even if PIT won their division.