Is "God becoming a man" even a valid statement now regarding the Trinity?

First God used Jesus as God/man to reveal to us His true Nature as Trinity. You see, if it had not been for original sin, it is possible that God the Son would never had assumed human flesh in the form of Jesus. So the Trinity still exists. This creates a problem as to the role of God the Son since it seems original sin has determined it. My OPINION is that the role of God the Son and the Holy Spirit may have been different if it had not been for original sin. God does not change as far as the Trinity is concerned, but even I am puzzled if that has to apply to their specific roles since creation would still have been attributed to God the Father. I asked this question once herein, and never received a better answer than my own. But the Trinity definitely would still exist. If any well qualified TTINITARIAN CAN ANSWER THAT BETTER, I'd sure like to hear from them. Because God actually used the Divinity of Jesus as God/man to reveal to us the Trinity. That Revelation would have had to be revealed differently if the Son had never assumed human nature.