It is possible that the Musar movement of R. Salanter and his ideas do not work as well as one would hope. But when I was in the Yeshiva world I found that combination of intense learning of Gemara and Musar [Ethics] [the ethical works of the rishonim [medieval authors]] to be a potent combination that works for self improvement. And from what I can see -it does work to a high degree.. [The only thing is that I felt I needed the imput of idea from Rav Nahman also.]
I mean to say that the way of the Litvak yeshivot is good in which the morning is devoted to in depth Gemara learning and fast in the afternoon, while Musar is only given a short amount of time. Still the Musar periods I think should be expanded.
