A few things not being discussed (to my knowledge anyway):
Expecting players to play another 3-4 games after their conference championship. That will allow too many more intense games for injuries. This does not bode well for any team short on depth, like a Cinderella team who could upset somebody once, but will never make it through a gauntlet. It also will not settle who the best team is. Likely there will be a great team who's QB and/or other impact player(s) get hurt, and after the playoff games it will be "They really were the best team all season, but their QB got hurt in that second playoff game." It will not settle, but only change the conversation, about who the best teams really were.
And secondly how do they plan to get star players to play an extra four games, further risking their pro career, with no extra money? I expect a union to be created, and players to get a big chunk of the money. Then we will get the holdout drama of pro sports every couple of years.
And does anyone really think any team outside the top teams every year, really have a chance anyway? (No, they don't.)
Besides that, teams with the most depth will win these wars of attrition. Say hello to the same 3-4 teams winning it every year, like it is now. Including worse teams with weaker rosters will not change anything. It will amplify it.
CFB is killing the golden goose by always chasing the dollar. Know enough when to leave it alone.