That's admittedly less good of a deal for the B12 and ACC than I initially thought.
During CFP negotiations in the spring, the Big Ten proposed a 14-team playoff featuring multiple automatic qualifiers for the power conferences: three each for the SEC and Big Ten; two each for the ACC and Big 12; one reserved for the best G5 champion; and three at-large spots. The 3-3-2-2-1 concept received backlash from leaders of the ACC and Big 12.