I would actually love to see a CFP that supplants the current CCG system. One way to actually get P5 buy-in might be to give each P5 DIVISIONAL winner an autobid to the playoff field. And, you could still use the CCG venues for the quarterfinals - instead of CONFERENCE championship games, they become Regional championship - North, South, East, West - or something like that.
Round 1 held the first weekend in December at campus sites, with the top-4 divisions winners getting an automatic pass to the Regional championship.
Round 2 is held the following week at the CCG/Regional championship venues. Round 1 winners v. the top-4 division winners (who got a Round 1 Bye)
Then, you simply spill into the current CFP semifinals and NY6 system.
Here's what 2017 could have looked like:
EAST REGIONAL (Atlanta)
(9) Alabama (wild card) at (8)USC (PAC South) on Dec. 2
Winner plays v. (1)Clemson (ACC Atlantic) in Atlanta on Dec. 9
SOUTH REGIONAL (Arlington, TX)
(10)TCU (B12 South) at (7)Ohio St. (B1G East) on Dec. 2
Winner plays v. (2)Auburn (SEC West) in Arlington on Dec. 9
WEST REGIONAL (Santa Clara, CA)
(11)Stanford (PAC North) at (6)Miami (ACC Coastal) on Dec. 2
Winner plays v. (3)Oklahoma (B12 North) in Santa Clara on Dec. 9
NORTH REGIONAL (Indianapolis, IN)
(12)UCF (G5) at (5)Georgia (SEC East) on Dec. 2
Winner plays v. (4)Wisconsin (B1G West) in Indianapolis on Dec. 9
CFP SEMIFINALS
Regional Championship Winners meet in Rose and Sugar Bowls on January 1.
CFP NATIONAL CHAMPIONSHIP
Semifinals Winners meet in National Championship game in Atlanta, Georgia on January 8.
When compared to the status quo, it only requires one additional game for 4 teams (those that win Round 1).
*Editorial license to pick Round 1 and 2 winners.
EAST: Alabama beats USC in Los Angeles, and then beats Clemson in Atlanta.
SOUTH: Ohio St. beats TCU in Columbus, and then beats Auburn in Arlington.
WEST: Miami beats Stanford in Miami, but Oklahoma beats Miami in Santa Clara.
NORTH: Georgia beats UCF in Athens, and then beats Wisconsin in Indianapolis.
Sugar Bowl = (3)Oklahoma (WEST) v. (9)Alabama (EAST)
Rose Bowl = (5)Georgia (NORTH) v. (7)Ohio St. (SOUTH)
CONSOLATION NY6 BOWLS
PEACH: Auburn v. Miami
FIESTA: Stanford v. UCF
COTTON: USC v. TCU
ORANGE: Clemson v. Wisconsin