I believe that no one can see God and live - and no one has seen God - except as revealed in Christ.
That does not mean there are no other Persons of the Trinity. It does not mean the other Persons do not act (they are not benign when it comes to man). When Jesus was baptized the Father spoke and the Spirit descended upon Him. God is One in three persons.
The language here is problematic. Christ doesn't simply reveal God; He is God. Christ is not, however, the sum-total of God's self-revelation. If Christ is the sum-total of God's self-revelation, then we have a dichotomy between Jesus and Scripture, which cannot be.
God reveals Himself in the Old Testament--especially to Moses. It is hard to make the case that Moses is speaking with the Son (with the warning about seeing God's face) since Peter didn't die seeing Jesus' transfigured face.
Moses could not see the glory of God and live. The bearers of the Arc could not touch it and live. God is transcendent. But in Christ He is God with us.
But how can you reconcile that no one can see God and live with the fact Jehovah appeared to Abraham?
The issue isn't seeing God, per se. People did that as seen here:
[9] Then Moses and Aaron, Nadab, and Abihu, and seventy of the elders of Israel went up, [10] and they saw the God of Israel. There was under his feet as it were a pavement of sapphire stone, like the very heaven for clearness. [11] And he did not lay his hand on the chief men of the people of Israel; they beheld God, and ate and drank. (Exodus 24:9–11 ESV)
The issue, of course, seems to be seeing God's face. Moses does see God's glory, the "afterglow," so to speak. It is of note that the only thing described by Moses is what was under God's feet, suggesting that they were face-down before Him.
"Seeing" God is clearly an allusion to seeing Him in His fullness.
Do you believe God changed how He operates when it comes to the New Testament (i.e , the Father is silent to men except through Christ in the NT only, but the reverse is true in the OT)?
This is a Red Herring, really. It avoids the question I asked earlier: If God tells Moses, "no one can see my face and live" and if that was Jesus (Logos, to use your word) and if during His earthly life Jesus was transfigured before Peter (among others), then why didn't Peter die when he saw His transfigured face?
What is more, the Father does speak audibly in both the Old and New Testaments. He speaks at the aforementioned baptism of Jesus and He spoke audibly to all Israel at Mt. Sinai. So, there's no change of operation.
The Archangel