I don't think there is any doubt Alabama was the best team in college football last year. Any ranking system will be imperfect, but a playoff will ruin college football just like it ruins college basketball. You might say but I love March madness. Fine, but it has made the regular season totally irrevelevent. I would say there is already a football playoff system, it's called the regular season. for the most part if you lose your out, which makes every game important. The problem with the disparity of teams like you mentioned with Ohio State is you have one conference that is way better than all of the other conferences. The Big Ten, 12, Pac 12, ACC, and Big East have no where near the talent and depth of teams as the SEC. Sure there is one or two decent teams then a bunch of slugs. Thats why Oregon sets the world on fire in the regular season then gets hammered in the bowls every year. Look at the Big 10 this year, there is not one good team in the entire conference. WV looks pretty good, but they would get pummeled by Alabama or LSU. There aren't very many stand out teams this year, but that's why they play the game.