It affords 7 more teams with a chance, today their chance would be zero. It also means you have to win more games. I THINK for teams that generally end up 5-12 season after season, it's obviously a better shot, even if not by much. But then, the might also have a good year and be a conference champ (think PSU).
Consider a team that hypothetically ends up ranked 8 year after year after year, their chances obviously are better, maybe it's only 1%. They have to beat 10 each time and then beat 4 then 2 then 1. For them, it's a better chance, low though it really is.