If the P4 expand, they revise the CCG rules and provide for conference semi-finals, including divisional wild card(s) - so, you get all of the top teams in the revised 'playoff' structure with hardly any change to the CFP system (other than the autobids for the P4 champs).

Something like this:

SEC: #1 Alabama v. #21 LSU; #14 Auburn v. #15 Florida
ACC: #3 Clemson v. #16 West Virginia; #12 Florida St. v. #13 Louisville
B1G: #2 Ohio St. v. #7 Penn St; #5 Michigan v. #6 Wisconsin
PAC: #4 Washington v. #11 USC; #8 Colorado v. #9 Oklahoma

There two additional weeks of voting, so the rankings change after the conference semi-finals and CCGs; so, even if #21 LSU wins the SEC or #16 WVU wins the ACC, they are catapulted in the rankings before the CFP with two big wins down the stretch.

The conference championships are held a couple of weeks before Christmas, so the current bowl structure essential remains in place.

B1G/PAC champs meet in the Rose Bowl; SEC/ACC champs meet in Orange or Sugar Bowl.

Winners meet for the national championship.

TV is never going for any system that the top 2 teams could play ever before the title game. I don't know what folks put systems out there where that is even remotely possible. That is DOA. TV doesn't give a rip about tradition.

Too two seeded, you mean. But yes, point taken.