I think that there is something important to be discussed here, and that there seems to be two different mindsets - both historically with previous Western Rites and now - in how the Western Rite is interpreted.
1. Trying to resurrect the Liturgy as it existed 1000 years ago, or getting close to it.
2. Viewing the Roman Mass / Anglican Catholic Mass as continuous, living tradition which, although being heretical, can be adapted to be Orthodox and thus have continuity with the Apostles both theologically and historically.
The Western Rite of today - in ROCOR and in Antioch - has taken the 2nd route, which is why the Western Rite Churches have flattened, white leaven bread, traditional Gregorian Chant, birettas, Fiddleback Chasubles, and even some Post-Schism devotions, like the Litany of the Saints, the Stations of the Cross, etc.
If you look at the Mass that is being used in this video, that is, "The Liturgy of Saint Gregory," you will see that it is based heavily not on some 1st millenium rubric, but rather, the Tridentine Mass (that is, the Roman Mass before it was completely transformed in the 1960s), but changed so that things which are clearly not Orthodox have been removed or purged. Most notably, an Epiclesis as well as a Cherubic Hymn has been added to it.
For comparison:
The Liturgy of Saint Gregory the Great:
https://docs.wixstatic.com/ugd/144b2c_20fb156e03c34f56a6dc312f73f9888d.pdf
The Tridentine Mass:
http://www.extraordinaryform.org/ExtraordinaryFormTextLandscape.pdf
Saint John Maximovitch's experiment of the Western Rite takes the former route, using the rubrics of 1st millenium French liturgical usage, and filling in the gaps with the Liturgy of Saint John Chrysostom.
The Liturgy he helped establish - the Liturgy of Saint Germanus - is still practiced by the schismatic Orthodox Church of France, and by one canonical Church in the United States. It can be seen here:
Me personally, IF there should be a Western Rite, I'm completely against the former path (unless it already exists and is practiced by a community, like the Liturgy of Saint Germanus), because such a Mass can NEVER be fully replicated to be what it WAS. No idealized imagination can perfectly match what a Roman Orthodox Mass was; the Orthodox Roman Rite Mass of 800 is dead along with the Roman Orthodox Catholic Church, when it was TRULY the Roman Orthodox Catholic Church and not an impostor, brought to spiritual death by its false doctrines.
To try to artificially reconstruct what it was like in the good ole days is, in my opinion,
is as artificial as the Novus Ordo Missal of the Roman Catholic Church - mind you, which had the exact same goals but with a more significant Protestant mindset (let's get the Catholic Mass back to what it was like in the Early Church, with communion in the hand, more vernacular languages, and less theologically extravagant language!). And boy. do we see the results of that horrible idea.
IF (key word "IF") there should be a Western Rite, it should be for pastoral reasons and it should be with a living, continuous tradition. The Eastern Liturgical Tradition of Constantinople wasn't broken with the Acacian schism, or iconoclasm, so I don't think that it's out of the possibility that those who want to become Orthodox but retain their liturgical traditions shouldn't be denied, particularly when the Tridentine Mass has legitimately retained a significant amount of Orthodox practice, and has an organic tradition going back to Saint Gregory the Great himself.