The Bottom 70 or so schools stand to make a tremendous amount of money if they are grouped with the big schools as compared to each other. They have all the motivation in the world. It's the top schools that would have to be convinced there is merit to the idea, not the other way around. But OSU shares revenue with Rutgers, so it isn't impossible.
If you're right and the top schools get so many guarantees it won't happen to them, then they won't care about it one way or the other.
So the organizers go to the next 70 schools who all say, "We love the idea, we're in, but we line-item veto the relegation aspect because it's a terrible idea that doesn't work at all for our business models."
Then the organizers go to the Top 10 and say, "Hey, the rest of the guys are in, but they said no effin' way to relegation."
And the Top 10 say, "Fine, it doesn't affect us either way, and we agree it's a terrible idea for the way a college athletic department has to work, can't believe you actually pitched it to them, we were laughing the entire time. We're happy to go forward without the stupid relegation thing."
And the Top 80 league is formed, without relegation, which would be terrible for all but the Top 10 or so.
Again, I like relegation in Euro soccer. And theoretically I like the idea of how it could affect competition in college football.But in reality, that's a completely different business model that simply doesn't work for college athletics.