Noting the ACC also tried when just Miami came onboard and was at 11 for the moment. Lash may be correct about the depth of the efforts then.
There may be some support from schools in less prominent conferences due to several of them having difficulty maintaining 12 members or constantly having to address divisional line-ups. There's just not enough current FBS schools for every exisiting conference to be at 12, 14, or 16 members.
Still, the question remains, why have the CCG if round-robin play exists? Even at 12, re-matches can get frequent. Not opposed to re-matches, but every year? Schools that did expand to 12-plus shall claim they expanded for the CCG, and abolishing the rule after-the-fact would be unreasonable due to the resources that were committed for it.
Here's a thought. Maybe the B12 is putting the issue on the table again first, in order to justify or convince the majority of conference schools to actually expand for a CCG? The argument would be, "well we tried with ten, and it did not get accepted, so let's look to add." Could this be at-work again?
The fundamental question is has circumstances changed enough to overturn the rule? With the trend ever greater for fewer but larger mega-conferences, it appears the rule would stand. On the other side of the argument, let conferences do what they want to do in that they have so much freedom with expansion, raids, TV contracts, bowl deals, etc. Organizational (the NCAA) is flexible on some big stuff and hard-nose on other stuff---as dictated by power concentration.
However, the basic question is more interactive now, with the playoff structure and new bowl agreements.
The problem with college football is perception.
It would have been a total joke this year had the new four team playoff system been in place this year because Notre Dame, Alabama, Oregon, and most likely Florida would have made the four team playoff.
Kansas State would have most likely been left out because there was not an extra championship game to compare Kansas State with Florida.
Since the experts would point to Florida as not having the opportunity to play in the SEC championship game by losing to SEC Championship game participant Georgia, Kansas State would have a bigger perception issue as a member of league that did not have a championship game for comparison.
Maybe Kansas State did not deserve to be one of the four teams if the system would have been in place this year by losing in the Fiesta Bowl, one thing for certain the University of Florida did not belong either based on getting totally pounded by Big East co champ Louisville in the Sugar Bowl. The fact is perception of the SEC would of helped Florida get one of the four team bids and this is a major problem with college football.
I think the Kansas State football coach and several other Big 12 guys just want a fair comparison by playing the same number of games including a potential 13 championship game to ensure a fair comparison of making the four team playoff.
The OOC cupcake games can be corrected with stronger OOC schedules for better comparison of which schools deserve one of the four playoff sports, the championship game comparison is at the mercy of a very stupid and outdated NCAA rule requiring 12 members to play this made for TV 13 regular season game.
I believe most of the current power leagues would welcome a Big 12 championship with or without 12 schools to make it more fair comparison of which schools are selected for the new four team playoff.
Either all in NCAA or all out in major football
Again maybe this is a test to get traction for the power leagues to split from the NCAA.