There is a sort of Achilles heel in Breslov in that in spite of the tremendous advice of Rav Nahman, there is a kind of tendency for it to take people away from straight Torah. The advice really works best in a context of a place that is devoted to learning Gemara.--i.e. a regular Litvak yeshiva.  This is hinted at in a letter Rav Nahman wrote to his group in Breslov מאסתי בישיבת ברסלב ''I have become disgusted with Yeshivat Breslov'', -Even though the intension of the letter was to say that he was upset with the town and would no longer dwell there, still there is a hint in that letter.