Well one thing I'd like to see is the end of a situation like we've had where the patriots are the only competent team in their entire division so they are (1) guaranteed to win the division every single year and (2) almost guaranteed to get a bye week and home field throughout the playoffs thanks to the easy six wins handed to them annually. Then they just have to win two games at home and Super Bowl here we go again. After 15 years of it, it's gotten old. The Packers had something close to that in the NFC North for years and years. The Steelers had it in the AFC North too. Yes we want to maintain rivalries but franchises that are perpetually awful all being in the same grouping that has one dominant team is predictable and no fun for anyone.
The NFC East is a crap shoot every year, I don't think the same team has won the division back to back in 20 years and every team has won it. And there are three Super Bowl champ teams in that timeframe so they came off that and lost the division the next year. That's how it ought to be in every division... competetive.
That’s why I like the Pro/Reg idea.
Expand to 34 teams, then break them out into two divisions of 17 teams.
This allows for a 16-game season with everybody playing each other in their division.
Now of course here in the US, you have to have playoffs, instead of merely rewarding the team who has the best overall body of work over the course of a season, so just take the best four teams and that’s your playoffs.