Here's part of the problem, OOC games have become automatic wins against lesser opponents. These types of OOC schedules do nothing to show how conference stack up against each other. All they do is make sure everyone is "bowl eligible. I use to love "back in the day" when all the PAC teams ALWAYS played a BIG team every year.
And you are right, with the league expansions, some teams are going to get easier schedules. Next year, Oregon doesn't play Ohio St, Purdue, UCLA, Michigan or Michigan St. Oregon does put up some serious frequent flyer miles with road games at Penn St, Northwestern, Rutgers and Iowa.
Tennesse doesn't play Texas, Texas A&M, Auburn, South Carolina, Missouri or LSU in 2025. My real point is that with these large conferences it's a lot more difficult to "declare" a conference champion when you don't play everyone in your conference. And how do you know how good some team is when they have a schedule that doesn't play the toughest teams in the conference.
Finally, if teams are playing soft OOC you have to rely on conference games for comparison and then it just comes down to conference chest pumping which doesn't settle anything either. So we have expanded imperfect playoffs.