I really think you need a new playoff format. Every year we see Division winners with no business in the playoffs. This year it was the Texans. We need a new Playoff format based on Wins not the Division they are in.
Continue to play in the division for the regular season, due to travel, rivalries ect. But for the playoffs take the top 6, give the top 2 a bye just like now and play the WC games just like now. Make sense?