As someone who regularly takes the Bx15, I disagree. Sure, during the morning rush, not many people stay on past 149th, but Bx15 Limiteds become fairly crowded before 149th Street during the PM rush and on weekends. Having an M125 will cause more overcrowding on the already crowded 2 and 5 trains and will also cause the bus stop to be more overcrowded as well.