I beg to differ with you, however, concerning the existence of a Western Rite in Holy Orthodoxy, the Holy Synod of Antioch has authorized two Western Rite liturgies--the Divine Liturgy of St. Gregory, based on a pre-Tridentine Roman rite, and the Divine Liturgy of St. Tikhon, being a version of the Anglican Prayerbook liturgy incorporating the corrections proposed by the Holy Synod of Moscow in response to St. Tikhon's query during his talks with the Anglican Bishop Grafton of Fond du Lac. (St. Tikhon refered the question because there seemed substantial doctrinal agreement between Holy Orthodoxy and the Anglo-Catholic version of Anglicanism represented by Bp. Grafton.) These seem to exist primarily as a pastoral tool for congregations seeking to flee the Western apostacy: most missions and parishes organized as Western Rite seem to eventually change over to the traditional (Eastern) Rites of the Orthodox Church.
The Old Calendarists also have a Western Rite based on the Sarum Missal, which grimly delights me, as it serves under Ukranian Old Calendarist bishops (counter-unia!).