I'm sorry to see much of what is in the original post. My experience in the Holy (Greek Orthodox) Metropolis of Pittsburgh is quite the opposite in connection with this matter of "Hellenocentrism." At my age, almost 60, I recall the days of the Greek culture being part of the "dual mission" of the church in the GOAA. However, during the last 30 years, Greek cultural activities have been substantially minimized. Out of 6 parishes in and around my area, 2 have a dominant Greek ethic flavor, one of those is an inner-city parish, the mother church to 4 of the parishes that are included in my discussion herein. But all 6 parishes are overwhelmingly parish churches of Eastern Orthodox Christianity. All of the parish priests are dedicated servants in the Vineyard of our Lord, preaching the Gospel of Christ, teaching the faith, and their various parish ministries assist in this regard. Many of the active faithful parishioners are not of the Greek ethnic background, though almost exclusively due to marriage.
The genuine Byzantine Chant may not be at the point of excellence such as exists on Mount Athos, but it is not poor, either, though there are choirs that sing responses and hymns of the Divine Liturgy in Western melodies.
In these 4 of the 6 churches, Greek culture is a token presence.
Knowledge of the faithful of our faith remains a challenge, but not for want of parish, priest's, hierarch's, metropolis, and Archdiocesan ministries dedication and initiative to education and instruction to improve our knowledge and spiritual growth.
This, the majority of parishes are thriving ecclesial centers.
Read the last issue of the "Orthodox Observer" and look at all the strategic initiatives Leadership 100 is funding; these Archdiocesan, national ministries and initiatives, are not the marks of a church in decline.
(I'll address the matter of national organizations when I'm less tired.)