That's why Missouri left and it is also why Nebraska moved to the B1G. Now look at how both football programs have cratered.Still living in the $EC world.
Of the 4 schools who left the Big 12 Nebraska and Missouri have slightly more tv cash but both football programs are worse. aTm is about the same in football. Colorado is geographically in no man's land and they now have a higher profile to California recruits. Potentially they could benefit the most from the move but certainly they aren't a power in football and I think the Pac 12 distributes less cash than the Big 12.
Bottom line none of the 4 schools which left the Big 12 are significantly better off than if they had stayed.