Man's soul was created immortal because it is life which is from God. Had Adam not sinned, he would have never died. Adam's daaged soul is passed on to all of us. God doe snot created damaged souls.
Our source of life is God. Without God we perish. Because we inherit a damaged soul, we are destined to death. God came and made it possible for us to be restored to our original state. In order to do that we must repent of our fallen will, come to Him, and follow His steps.
The unrepentant soul will perish, as Ezekiel states. If the unrepentant departed are to "exist" in a state of complete darkness (separation from Light, which is God), not knowing where they are for all eternity, and you want to call it "life" then, sure, they will be "immortal."
Does this mean that in Orthodoxy, the spiritual and the physical are treated the same, or in fact ARE the same? Do you consider a soul in hell to be nonexistent, or do you simply rename it "dead", thus it is mortal? I think that the Latins and the Protestants see the issue of mortality as simply one of existence, not one of destination.
The unrepentant soul will perish, as Ezekiel states. If the unrepentant departed are to "exist" in a state of complete darkness (separation from Light, which is God), not knowing where they are for all eternity, and you want to call it "life" then, sure, they will be "immortal."
On the one hand there is "life" and "death", and on the other hand there is existence. Two separate issues. It just doesn't seem like hell is that big a deal in Orthodoxy.
In addition, what makes you think that the damned will not know where they are? I think it will be clear to them since:
Rom 14:10-11 : 10 You, then, why do you judge your brother? Or why do you look down on your brother? For we will all stand before God's judgment seat. 11 It is written: "'As surely as I live,' says the Lord, 'every knee will bow before me; every tongue will confess to God.'"
After the judgment, how can anyone not know where he winds up?