I don't like 12.
8 game scenario is the most accurate way to have a bracket.
1-8
2-7
3-6
4-5
Meaning, if we are up in arms about determining who is 1-4, we can still be that way with 12 team playoffs - because the top 4 selection will receive a bye week. The other 8 teams are playing "win or go home" games, and we are right back into that top 4 dilemma again.
Aren't we trying to avoid that confusion and just settle it on the field?
Playoffs should be 8 games, kick it off, and no preferential treatment of bye weeks.