The extra CFP games should more than offset CCG's going away financially. Just award the conference trophy based on regular season records and tiebreakers. This year would be Bama, tOSU, Tech, and UVA. It's not like the CCG makes it any more "undisputed" because unequal conference scheduling and tiebreakers make even the participants in those games questionable. Ole Miss and aggy are tied at the top of the SEC and are sitting home because of the conference SOS tiebreaker, something they have no control over. (Edit: Also just realized that the second spot in the ACC title game is a five way tie which Duke won also because of conference SOS which again, the others have no control over.)
The first weekend in December could be the two highest ranked G5 champs for the last spot. This year it would be UNT v. JMU. Maybe move Army Navy to this weekend too (I think it used to be this weekend until CCG's became a thing). I think the NCAA and the networks should also push for more interest and attention to the FCS playoffs which start this weekend as well. JMO.