Well it was slow to be adopted in the Church of the East, which today survives as the Assyrian Church of the East, mainly in Iraq, Iran and Eastern Syria. It, and the Syriac Orthodox Church, were victims of the Sayfo (what the Syriac Orthodox call 1915, “the Sword”, the genocide that killed millions of Armenians, and about 90% of the Syriac Orthodox and Assyrians living in the Ottoman Empire, and about two thirds of the Pontic Greeks…most of the churches mentioned in Revelation are no longer extant due to a combination of the Sayfo and the forced population exchange between Greece and Turkey in the early 1920s. Eastern editions of the Peshitta lack the Apocalypse; the West Syriac Peshitta used by the Syriac Orthodox, Syriac Catholics and Maronite Catholics does include the Apocalypse and the other books missing from the East Syriac Peshitta, which has only 22 books in its New Testament; these books were translated as part of a new translation in the 16th century by St. Thomas of Harqel, known as the Harkleian Bible, and were added to the Western Peshitta. In existing English translations however one will not notice a change of literary style, since this is usually lost in translation, although with the original Greek New Testament, there is an exciting new translation by the controversial Eastern Orthodox scholar Dr. David Bentley Hart* which seeks to preserve the distinct literary styles of each of the authors. Reading it one realizes that St. Luke wrote the most elegant prose of anyone in the New Testament, although of course if one reads the original Greek one can come to the same conclusion.
*Dr. Hart is controversial because he is a universalist and Eastern Orthodoxy officially regards Universalism as a heresy, but thus far no one has anathematized him, since there exists in two or three of the less strict Anglophone Orthodox jurisdictions a tiny minority that includes a few priests who are universalists and justify it based on the writings of St. Gregory of Nyssa, Origen (who was anathematized as a heretic in the Chalcedonian churches by Emperor Justinian for teaching Universalism), and St. Isaac the Syrian, who it turns out was a member of the Church of the East and like most members of the Church of the East between 600 and 1500 AD, believed that Hell was a temporary place of punishment. You will not find Universalists in ROCOR, or the Serbian Orthodox Church, or the Georgian Orthodox Church, or any of the more traditional Orthodox churches that use the Julian Calendar for fixed feasts as well as the movable feasts connected to Pascha (Easter Sunday), which all Eastern Orthodox churches except for the Church of Finland and the portion of the Church of Estonia that uncaonically left the Moscow Patriarchate and entered the jurisdiction of the Ecumenical Patriarch of Constantinople without a release, which is contrary to the ancient canons; the EP has encroached on the territory of several other churches including the Antiochian Orthodox Church, and the Orthodox Church in America, whose autocephaly the EP does not recognize, because it was granted by Moscow in 1970, so I suppose the EP views the OCA as part of the Moscow Patriarchate even though its not, as demonstrated by the vigorous criticism the OCA has directed at the MP over the tragedy in the Ukraine, criticism which would cause their bishops to be deposed if they actually were still a part of the MP. Ironically, the Universalist faction mainly exists in the Ecumencial Patriarchate, the Orthodox Church in Amerida and the Antiochian Orthodox Church, and the status is the Antiochians have severed communion with the EP because the EP has sanctioned intrusions on Antiochian canonical territory by the Greek Orthodox Church of Jerusalem, which is stricter and more traditional than Antioch, and as mentioned above, the EP pretends the OCA is a part of the Moscow Patriarchate because they are unwilling to admit that the power to grant autocephaly is held by all autocephalous churches and not just the EP, and the OCA meanwhile tries to work with both in the Society of Canonical Orthodox Bishops of America to increase unity among the churches of North America.