College football needs a playoff system. Here is my solution to the format; 8 teams, each of the "power 6" conferences will receive an automatic bid, the other two bids will be at-large (given to top ranked team in group). Here is my ranking of the power 6 conferences, points are as follows: A (7), A- (5), B+ (4), B (3), B- (2), C+ (1), C (0), C (-1), D (-2).
This simple 8 team format would allow everyone at least a shot at the big dance. It's not perfect, but it gets the job done.