Emunas1:
1) there’s no evidence to say you’re right and on the contrary- lubavitch today is centered around the Rebbe (pundits after gimmel Tammuz predicted that lubavitch would jump off roofs/ fall apart within 5 years/ appoint a different Rebbe)
2) interesting about davening- yes you have a point there. But the Mitteler Rebbe said that Chassidus boils down to achdus Hashem. And if I could add- this isn’t about escaping the world etc but is accomplished by dirah btachtonim (which The Alter Rebbe says in Tanya is the whole point of Creation etc not only this world but all worlds etc.)
So to sum up: Chassidus Chabad is all about Achdus Hashem as expressed through Dira Btachtonim