You quote Fr, Schmemann. Here's another one for you:
From Schmemann's Of Water & the Spirit: The first experience of the church is not that of an abstraction or an idea, but that of a real and concrete unity of persons who, because each one of them is united to Christ, are united to one another, constitute one family, one body, one fellowship.
And this gathering is sacramental because it reveals, makes visible and "real" the invisible unity in Christ, His presence among those who believe in him, love him, and in him love one another; and also because this unity is truly new unity, the overcoming by Christ of "this world," whose evil is precisely alienation from God and therefore disunity, fragmentation, enmity, separation. (p.118)
Your stance, to me, seems more of "this world" than of the Kingdom since the council of Chalcedon, in fact, deemed the miaphysitism of the Copts and OOCs to be acceptable. The rejection of miasphysitism appears to be the subordination of Christ's will to man's tradition. (Chalcedon being the conclusion of the Church which accepted both views and man's tradition being the rejection of Chalcedon's conclusion in favor of one of the two acceptable views.)
From: Beyond Dialogue: The Quest for Eastern and Oriental Orthodox Unity Today
Rev John H Erickson, Dean, St. Vladimirs Seminary
"The question at this point is whether we really desire unity more than our present disunity. Will we continue to be divided simply by the power of division itself? Certainly at the present time we seem to prefer the disunity of the status quo. Our cherished anathemas and preferred formulas give us a sense of security. Without them, our very identity seems threatened. Of course, much of Christian doctrine arose precisely because of the need to define the truth in opposition to heresy. But the words in which the truth are expressed are not the same as the truth itself. Failure to recognize this can lead to the kind of situation described by St. Gregory of Nazianzen. He notes how, when we try to lift a handful of water to our lips, some can be found slipping through our fingers:
In the same way, there is a separation not only between us and those who hold aloof in their impiety, but also between us and those who are most pious - a separation in regard both to such doctrines as are of small consequence and to expressions intended to bear the same meaning.
Certainly this is the situation in which the Eastern Orthodox and Oriental Orthodox find themselves today. ...