I don't know how relevant this is, but Naqshbandis don't practice tasawwur ash-Shaykh... so maybe a lot easier to come to terms with than the others. Actually, Naqshbandis dhikr is a lot more contained and controlled - has no movements, and hardly any loud dhikr. Any dhikr done in a group is done individually and not in unison. Listen to this for more: Distinguishing Features of the Naqshbandi Tareeqah