The Orthodox church accepts 3 more deuterocanonical books than the latin canon. So they dont know what there talking about. Secondly the early church originally only defined which books should be read publicly in church. Baruch was always included but never Revelation. The term deuterocanonical is a 16th century western term, In Orthodoxy those books not read in church but still considered scripture were refered as Anagnoskemeno, meaning "worthy to be read".
Using the protestant understandinging"of what the early church used" would mean that Revelation is deuterocanonical (non canonical) but Baruch would be canonical.
St Athansius in his festal epistle 39 lays the groundwork for the NT canon, he mentions the OT canon with the addition of Baruch and then speaks of a second tier of books which are worthy to be read:
But for greater exactness I add this also, writing of necessity; that there are other books besides these not indeed included in the Canon, but appointed by the Fathers to be read by those who newly join us, and who wish for instruction in the word of godliness. The Wisdom of Solomon, and the Wisdom of Sirach, and Esther, and Judith, and Tobit, and that which is called the Teaching of the Apostles, and the Shepherd. But the former, my brethren, are included in the Canon, the latter being [merely] read; nor is there in any place a mention of apocryphal writings.
As we can see St Athanasius categorizes various books into 3 categories. The first category is the Canon, which at the time in the Church of Alexandria included Baruch but is now considered 'deuterocanonical'. He then lists books which are worthy to be read, included are some 2 NT books namely the didache and shepherd of Hermas. A third group are apocryphal, which have no value.
St Cyril of Jerusalem in 312 a.d. makes the same case but does not list Revelation as part of the canon (most likely relegating it to the second tier of books- worthy to be read):
Then of the New Testament there are four Gospels only, for the rest have false titles and are harmful. The Manicheans also wrote a gospel according to Thomas, which being smeared with the fragrance of the name 'Gospel' destroys the souls of those who are rather simple-minded. Receive also the Acts of the Twelve Apostles; and in addition to these the seven Catholic Epistles of James, Peter, John, and Jude; and as a seal upon them all, and the latest work of disciples, the fourteen Epistles of Paul. But all the rest be put aside in a secondary rank. And whatever books are not read in the churches, do not read these even by yourself, as you have already heard [me say concerning the Old Testament apocrypha]. (4.36)
So we have Cyril make mention of books placed in the second rank. Once again apocryphal books are outright rejected. Thus Apocryphal books are not the same as the deuterocanonical books. In the early church apocryphal books were heretical, the deuterocanonical were scripture but in a second rank since they were not read publicly in church. in the early church canonical books did not mean they were the only scripture recognized, but only those sure books handed down and worthy of being read in LITURGY. The deuterocanonical books were worthy of being read by the laity and catechumens but not in liturgy. They were read in the church in the sense of privatley, as it is to this day.
The council of Laodicea which is binding upon the Orthodox church held in 363 a.d. makes this rule:
Canon 59. Let no private psalms nor any uncanonical books be read in the church, but only the canonical ones of the New and Old Testament.
In this canon we see the book of Revelation not included as canonical- using the understanding of the early church which ranked scripture into 2 categories. We see from the reference to private psalms (of the pious laity) that this canon is not refering to heretical apocryphal books, these were already rejected and not a point of dispute. The uncanonical books mentioned in this canon are the deuterocanonical which were still considered scripture and worthy of being read privately.
The point is todays understanding of what constitutes 'scripture' is far different than that of the early church.