The West eventually invented (or should I say returned to) the legalistic reasons of Judaism and applied them to God's atonement, neglecting to see that law and love are essentially different and mutually excusive, and that law cannot express or replace love.
This is reflected in the Gospels when Jesus "overrides" the law to save a man's life on a Sabbath, and +Paul reflects the same teachings in his Epistles regarding the issue of grace versus the law.
Theosis is rather accurately summarized in Wikipedia as
"[S]alvation from unholiness by participation in the life of God. According to this conception, the holy life of God, given in Jesus Christ to the believer through the Holy Spirit, is expressed beginning in the struggles of this life, increases in the experience of the believer through the knowledge of God, and is later consummated in the resurrection of the believer when the power of sin and death, having been fully overcome by God's life, will lose hold over the believer forever. This conception of salvation is historically foundational for Christian understanding in both the East and the West, as it has been developed directly from the apostolic and early Christian teachings concerning the life of faith."
Christ made it possible for mankind to be saved. In order for him to die on the cross for our sins, he had to become man. Thus his Incarnation was intended for our theosis, which is salvation, thorugh the atonment for our sins mad epossible by his death. Notice that there is nothing legalistic in all this.
But let us not neglect the intent. Legalistic western Christianity sees it as obedience to sovereignty of God, rather than attachment we feel for someone we love. If we struggle in our theosis, it must be out of love and not our selfish reasons or legal obligations.
Now, no one can be made to love someone. Forced love is no love. That has to come from the heart. And some people are good at imitating love, and even pretending to love for selfish reason, but that is not love.
How many people would love God just because he is God if there were no promises of rewards? How many people would go to church only to glorify his name if there was nothing in it for us?
Mind you, I’ma not trying to dogmatize my opinion—even if I am relentless
Your attempts to connect John Duns Scotus to Orthodoxy is comparing apples and oranges. All you see is that they are both fruit! Actually, Scotus represents that (scholasticism) which Orthodoxy soundly rejected through hesichastic fathers and, in particular, thanks to St. Gregory Palamas.
He was decidedly Aristotelian in philosophy, which is not the basis for the East.
Also, Scotus' theology is basically Augustinian, and Augustinian theology was likewise rejected by the East. So, any attempts to link Scotus to Orthodoxy is a non-starter.
Finally, Scotus' logical works works are heavily disputed, save for four books. He may have been influential in the western Church, but that in an of itself doesn't make him right.
Thanks for the video link. I must note that the concept of will, as described, is something I wholly disagree with. Will is a result of a "need." If all our needs are satisfied we have no reason to will. That "need" results either from an unconscious or conscious perception of either a lack or excess of something. Reason does not give rise to will. Reason usually attenuates the will.
Truth is truth, wherever it may be found. And there are links all over the place in the saints and among the Churches because of the Apostolic Faith. I'm not saying that Scotus was Orthodox or that the Orthodox are Scotists--just that I see an overlap of truth in both.
Regarding law--Jesus and St. Paul are speaking about the legalism of the Jewish law, but not the divine law, such as the 10 commandments. Jesus himself says, " If ye love me, keep my commandments." (John 14:15), and St. Paul several times enumerates sinners who will not enter the kingdom if they do not repent and keep the moral, divine law --drunkards, fornicators, adulterers, sodomites, etc. This is distinct from the Judaizers which St. Paul had little time for.
Regarding the will... We need God. So we will always have a will--the capacity to freely love God and neighbor.