At least the CCG is a reversible decision. If it doesn't work out they are not committed to it. Unlike Texas giving up the LHN and adding two unspecified teams from the G5 , which are irreversible decisions. Over the next 8 years without a CCG and just ten members lets say the Big12 had a chance of making the playoffs about 60% of the time. Just a guess. Buck, this means that on average the Big12 would have missed the playoffs two years out of every 5. (You probably need about 20 years of data before you can come up with reliable averages, but this level of math is probably over your head.) If you believe the consultants numbers, the chances of making the playoffs increased by about 4 or 5 % just by adding the CCG. I know you are math challenged Buck, but this means that the odds of having a team make the playoffs went up by adding the CCG. If it was 60% before it is 64-65% with the CCG. Plus they added about 3 million in revenue per school (This number will continue to go up) as long as they stay together and keep playing the CCG.
I think the money of the playoffs will be too much to resist a look-in to expand the field to 6 or 8 within the next 10 years. Adding more teams to the playoff field will also increase the chances that the Big12 makes the playoffs even if the rematches in the Big12 result in upsets at a higher than acceptable rate.