Cole, all those sources you quote are the opinions of various Orthodox individuals. I of course can quote the universalist opinions of other Orthodox individuals. I submit that that would be fruitless.
Where is the one place you can hear the voice of the Church? Not someone’s opinion, but the Church’s own voice? What is the one thing that an Orthodox cannot say of, “Well, that’s very nice, but I don’t believe that”? The liturgy. Everything in the liturgy is the official teaching of the Orthodox Church. Through the millennia, God has taken the writings and arguments of innumerable Orthodox individuals, and He has separated the wheat from the chaff, thus creating the miracle of the liturgy.
We must remember that most Orthodox believers in history owned ZERO books. They got ALL of their Orthodox instruction through the liturgy. Obviously, then, anything that the Orthodox Church wanted to make sure that the faithful believed was put in the liturgy. The faithful didn’t have study Bibles, or books, or pamphlets, or tracts, or magazines, or websites, or scrolls, or anything else. All such things either didn’t even exist or were the purview of the wealthy alone.
But please don’t believe me. I, too, am merely a fallible Orthodox believer. Read the liturgies of the Church. Better yet, participate in them. (Keep in mind, of course, that homilies are merely the personal opinions of the priest. God alone knows what errors, absurdities, contradictions, and even heresies have been spouted in these homilies. In fact, the heresiarch Nestorios, bishop of Constantinople, spread his heresy in his homilies.) You will find universalism asserted over and over in the liturgy. You will read a long time before finding passages that could possibly be interpreted as teaching unending Hell. But such passages are outnumbered 20 to 1 by passages that in no uncertain terms teach universalism.
If one does not accept that the liturgy of the Orthodox Church is the official teaching of the Orthodox Church, then anything goes, really. One could then say that just about anything is the teaching of the Orthodox Church, for there have been countless “Orthodox” books teaching just about anything you care to imagine.