If Team 1 has already beaten Teams 2, 3 & 4, then they should get an easier opponent in the last week. The matchups shouldn't be tournament style seeding #1-4, they should be dynamic matchups based on who you've already played and who you've beaten. Frankly, they should be more about resolving tie breakers and positioning teams for the CFP and bowl games than a true four team tournament. Now, the G5s should have a true tournament, but that is another issue entirely.