I get the point of multiple coin flips, but by the nature of the game, the coin is changing every time, and one, and even with the coin being weighted, it has some randomness in it. At least with college hockey, all but a handful of game are at least 2.
Like do you really blow off the game played in a really hard rain/wind if the #1 team in the country is beaten by Army because they run and the far better team has to pass? That does happen.
But because of the one game, it's a series of randomness put into it that can't be factored out when you play at least twice.
Still, any "series" for football would take many weeks to do, since it's unrealistic to expect a team to effectively play more than 3 times in three weeks. You can push one of them to 5 days, but you have to make up for that as soon as possible, since the game is very punishing to the body. Which is why Thursday games are more really bad than good.