I look at it in terms of reliability for a team with Super Bowl aspirations. You can clearly see that Prater (and most kickers in the league for that matter) strike the ball straighter and cleaner than Bass. It's a big advantage to have someone who you know is going to put the ball through the uprights with accuracy. People talk about Bass' percentage, which is mediocre, but even many of the kicks that he makes are near misses. I'm not messing around with this situation, regardless of if Prater's leg has diminished or the range becomes shorter when the weather turns. Bass was lucky to still have a job with the Bills, so it's not like he is owed anything or that this would be a Wally Pipp situation. The Bills would be crazy to go back to him imo.