“I would define MO as a Talmid or follower of a Talmid of Rav Yoshe Ber, whether it is Rabbi Twersky HYD, Rabbi Shechter, Rabbi Meiselman, or Rabbi Avi Weiss.”
This is a very unique definition. Not one that I have seen shared by anyone else. Certainly not the people who you are calling MO, except perhaps Rabbi Shachter.