Again, I don’t see how this could be the case if the idea of unity involves some level of re-absorption into their mother (Orthodox) churches.
It’s really quite simple. Let’s say - and I know this is totally
not going to happen; this is a mere hypothetical - that communion were restored between the RCC and the OOC, but neither one restored communion with the EOC.
The Coptic Catholic Church would simply be absorbed into the Coptic Orthodox Church, the Ethiopian Catholic Church into the Ethiopian Orthodox Church, the Syriac Catholic Church into the Syriac Orthodox Church, the Armenian Catholic Church into the Armenian Apostolic Church, etc. And each of the latter would now be in communion with Rome.
The Byzantine eastern Catholic churches, however, would remain as they are: Melkites, UGCC, Ruthenians, etc. They would all be in communion with the Latin Church and the six Oriental Orthodox churches, which would include what used to be the Oriental Catholic churches, and
none of the above would be in communion with the Ecumenical Patriarchate, Moscow, etc.
So the problem of the Maronites in this scheme is that in order to be Orthodox, they either give up their traditional liturgical orientation to Syriac and become Byzantinized like the Melkites were (joining the Antiochian Orthodox, I suppose), or join the Syriac Orthodox Church, perhaps infusing their rite with much more Syriac identity, but giving up Chalcedonian belief in the process.
If communion were restored between the RCC, the EOC, and the OOC - again, I know this is totally not going to happen any time even remotely soon and am speaking only hypothetically here - the Maronites would simply remain as they are. They have no counterpart, and there’s no reason for them to be absorbed into any other church. So they’re not really a problem at all…
I think anyone who said that would be criticized for “uniatism”.
No, they wouldn’t. It doesn’t fit the definition.
“Uniatism” involved forging new autonomous churches, deliberately made to be counterparts of a particular autocephalous or autonomous Orthodox church, and comprised of former members of those Orthodox churches.
If an entire Orthodox church - say, the Greek Orthodox Church of Antioch - were,
as a whole, to acknowledge communion with the Church of Rome, and vice versa,
that would not be uniatism at all, because no splinter group/church is formed.
It has never happened that way; no Orthodox church has
in its entirety re-entered communion with Rome. But if it were to happen, it would
not be “uniatism.”
It’s still not the ideal, though. The ideal is that as a communion we would restore communion: i.e. all 15 EO churches at once, or all 6 OO churches at once. I think the bishop of Rome would be very hesitant to restore communion with just one or two Orthodox churches, even if we were given the chance.