I have no hope of any full communion between the Catholic and Orthodox in my lifetime, considering that this was that last published list of of Catholic errors that I know of, from the Orthodox churches (excerpt):Concerning the union of the Eastern Churches with the Church of Rome, the Great Church of Constantinople, in August of 1895, made a reply to the Encyclical of Pope Leo XIII (1878-1903). … The Orthodox reply was published in the patriarchal periodical Truth. Signatories included Patriarch Anthimos VII of Constantinople (1895-1898), Bishops Nicodemos of Cyzicos, Philotheos of Nicomedia, Jerome of Nicæa, Nathanael of Prusa, Basil of Smyrna, Stephen of Philadelphia, Athanasios of Lemnos, Bessarion of Dyrrachium, Dorotheos of Belgrade, Nicodemos of Elasson, Sophronios of Carpathos and Cassos and Dionysios of Eleutheropolis. … 1. The first innovation was the Filioque (“and the Son”) addition to the eighth article of the Creed.
2. The second innovation cited is the substitution of holy Baptism with affusion (epicusis), where water is poured (ekcew) over the candidate’s head; or, aspersion (rantismos), when water is sprinkled on the candidate’s forehead.
3. The Patriarch of Constantinople reacted by closing the Latin Patriarchate’s church and denying the validity of their Mass of azymes, which was one of the grievances, mentioned by the Latins in their excommunication of the Orthodox.
4a.The One, Holy, Catholic and Apostolic Church of the Seven Ecumenical Councils, in concert with the ancient rituals of Rome and Gaul, hold that the precious Gifts are consecrated after the prayer of the invocation (Epiklhsis) of the Holy Spirit by the blessing of the priest, not by “Words of Institution.”
4b. In the Byzantine Liturgy, the priest does not speak in the person of Christ, but prays to God to effect the change.
5. The fifth innovation is that of administering communion in only one kind, excluding the laity from partaking of the chalice.
6. The Orthodox reject the existence of Purgatory and the necessity of punishment for sins that are forgiven.
7. Another erroneous teaching, which is distinctly Latin, accords the privilege to the Virgin Mary of being conceived without original sin.
8. The Orthodox prove by reference to the Fathers and the Canons of the Ecumenical Councils that the Pope was never considered the supreme authority and infallible head of the Church, but only the first bishop in respect of rank, as first among equals, privileges of honor having been accorded to him because he was the bishop of the capital city of the empire.
9. Other novelties introduced at Rome include the use of statues instead of icons. … the Church rejected the veneration of statues, …
10. … Pope Leo IX (1049-1054) reinstituted this practice and began a crusade against the ‘heresy’ of married clergy, which became one of the reasons for his excommunicating the Orthodox, he was defying and denying the authority of the universal Church, contrary to the words of Christ, and setting himself up above the whole Church.
11. ‘He that does not follow, but wishes to overturn and destroy, the customs of the Church decreed by the well ordained Seven Holy Ecumenical Councils, in the observance of Holy Pascha and the Menologion (calendar of the immovable feasts), and wishes to follow the new Paschalia and Menologia of the Pope’s astronomers,…let him be anathema and outside the Church of Christ and the assembly of the faithful…’”
12. [Unction] may also be received by many Orthodox faithful, who may not be ill or in danger of dying, such as during Great Thursday of Holy Week.
We see in the modern papacy the story of an apostasy from the Church, following the road first traveled by the Angel Lucifer, who rose as the bright morning-star [Is. 14:12].
trueorthodoxy.org/heretics_roman_catholics_brief_replies_papal_innovations.shtml#INTRO