Here's an article on the issue of the reception of converts from schisms and heterodoxy which I think merits close examination - it's treatment of Russian practice on this subject, and it's critical examination of Greek practice, is particularly important. I'd appreciate anyone's thoughts on this...
On the Question of the Order of Reception of Persons into the Orthodox Church, Coming to Her from Other Christian Churches by Archimandrite Ambrosius (Pogodin)
In the appendix, I found the following recollection by the author of this piece (who was once in ROCOR).
I had a minor experience, which I will now dare to relate. In 1952, I had a parish in Bradford, England. There were many refugees in this industrial city that had their own churches: Russians, Poles, Ukrainians and others. There was a substantial community of Galician Ukrainians here, who were Uniats. I was told that they were quite hostile towards us Russians. Once, at night, I had a call from the local hospital telling me that a woman "of your religion" was near death. Taking the Holy Gifts I hurried to the hospital. The night was not only dark but a heavy fog covered everything. One had to walk from one streetlight to another. I reached the hospital and was shown the ward where the seriously ill woman was laying in an oxygen tent. Here I learned that she was not Orthodox but a Galician Uniat. Her husband was sitting next to her, crying. I told him that she was not Orthodox but belonged to the Roman Catholic faith. It was urgent that any Roman Catholic priest be called. At the same time I assured the husband that I will not allow her to die without Communion, and if the Catholic priest could not come or does not come in time, I will give her Communion myself. The Catholic priest arrived quickly. He was an Englishman and did not know Russian or Ukrainian. I offered my help. I asked the sick woman if she repents of her sins and does she want to receive Communion. She answered, "Yes, Father" in her Ukrainian accent. I related her words for the priest and he gave her Communion. I was at the hospital several days later and was overjoyed to see that the sick woman was recovering quickly, and she was happy to see me. After this, I was walking on the street past a Galician club and was pleasantly surprised when all those who were outside the building doffed their hats and greeted me, a Russian priest, warmly. I told of this to our great hierarch, Archbishop John [Maksimovich] and said to him that I would have given Communion to the dying woman even though she was a Uniat. After this I was ready to accept any punishment that the Holy Orthodox Church would give me. Archbishop John’s reply was worthy of his sanctity and love towards people: "No punishment would have been given to you."
Seraphim