It is easy to say the Pope is the problem, but that is certainly not true for most going from Rome to Orthodoxy. I would say it is a combination of many things that don’t seem to add up. For those former Greek Catholics, it is a lack of connection to the patrimony. This includes restrictions placed by Rome and revised liturgies. :
Alexius, this is a bit of a red herring. I concede, easily so, that discontent in the Greek Catholic Churches have lead some to leave as they were rather easy pickings for those who felt this disconnect. If you are already feeling disgruntled in your existence and real and percieved failures to “maintian legitimate patrimony” a party coming along and saying “Well we haven’t failed there, join us!” we be attractive.
But invariably “ritual authenticity” must be a backseat/secondary issue. “Easterness” in and of itself is not an end goal. The fact that Greek Catholics of some jurisdictions have had Latinization only means, on the face of it, that they had Latinizations. But Latinizations (which I don’t generally like) are wrong why? Because “easterness” is always and everywhere sacrosanct. If one goes to EO because they have a better track record of “easterness” and one finds their dynamics more amenable in that regard, one leaves one church, and enters another for the WRONG reason.
In my city, the Greek Catholic church is arguably more “Eastern” than the Greek Orthodox (GOA) parish (so long as we are not handicapped for not being ethnic Greeks!) as we do not have kneelers or pews. But I don’t expect this morning to find a busload of disaffected Greeks at our door seeking to be “more eastern”. The truth or error will not rest of fall on the slavish devotion (or lack thereof) to sometimes arbitrary standards of “easterness” and patrimony.
I believe the big reason most EO will not become Catholic is the self-same reason most ANYONE practicing a faith of some sort will not become Catholic - the converts are exceptions to the rules! That is to say, people who are established and content stay where they are. Orthodox who ask Greek Catholics “Why aren’t you Orthodox?” are as often as not met with the response from the average Greek Catholic “Because this is what we are and this is where we are.”
If I had to speculate as to why we don’t see more notable conversions at the clerical level from EO to Catholocism in the same fashion that we see from Anglicanism, Lutheranism, Evangelicalism… Well I would say that it is because Orthodoxy has so very much still - sacraments, priesthood, liturgy - and has largely been unplagued by some of the controversial issues Protestants deal with.
An Evanglelical may come to a point where he asks “why aren’t we liturgical, why don’t we have ecclesial authorities, why don’t we follow Christ’s literal teaching of ‘Amen I say to you unless you eat my Flesh and drink My Blood, you have no life in you’?” And they won’t ask those questions because they ARE liturgical, they DO have ecclesial authority and they DO follow Catholic teaching on the sacraments. They have NOT been dealing with same-sex issues and women’s ordination (though the Church of Greece approved deaconesses, implementing it has largely been tabled!) So without these opportunities for “ah-ha” questions in the face of modernism and debacle, or barring some really extreme intra-communion disagreements on authority, most will well go a lifetime without questiong it. In the very same fashion most Catholics will do the same.
Now there have been clerical conversions to Catholocism from Orthodoxy (and vice versa!) but by and large, on the Catholic end, we don’t parade them around and they settle into Greek Catholic life quietly.
On the other hand, when Protestants become Catholic, often times Rome is the shadow over the denomination or the 900 pound gorilla in the living room to them in the same way Orthodoxy simply is NOT. As western Christians, an accute awareness is always before them that their patrimony includes a break with Rome… And midnight Mass from the Vatican (let alone the 1.1B Catholics of the world) is still out there serving as a reminder of something their community either directly broke from or still has some roots in. I mean heck, I have never heard of a US Evangelical congregation that uses any dating for Easter (if they celebrate it) BUT the Western (/Finnish Orthodox!
) dating. As Lutheran minister-convert turned Catholic priest John Neuhouse is known to say “To be a Lutheran is to everyday ask why you are not yet Catholic”.
Frankly, most EO in my experience - especially cradle-born clergy - don’t live in this sort of shadow, have these sorts of doubts or are much confronted with a demand to make a decision about “which direction to go” as things disintegrate around them.
But I think it is worth noting that a lot of EO generally slowly integrate into the Catholic Church via marriage. I went to Catholic HS with 4 guys with Greek surnames who were RC - Greek dad married Catholic mom, and made the transition.