So they haven't tried the 12 game playoff yet and now considering 14, seems odd.
The idea of a 14-team College Football Playoff starting in the 2026 season was discussed at CFP meetings in Dallas on Wednesday, just months before the start of the first season with a 12-team playoff. https://www.espn.com/college-football/story/_/id/39572477/cfp-officials-discuss-expanding-14-team-playoff-2026