Seeding teams honestly is critical. I posted in the other thread and will share here too - I think it would be fantastic to have all 12 teams play in round 1 with home games for the top 6 seeds. The top two remaining seeds get a bye in round 2. It would create a huge incentive to fight like hell during the regular season for one of the highest seeds.
Also, in general response to the topic of this thread: the expanded playoff has absolutely been a success. It caused some early season games to be less meaningful, but dozens (hundreds maybe?) of mid to late season games suddenly mattered this season where they would have been garbage time in previous years. The inclusion of legit contenders like ND and OSU is great too.