Jesus is homoousios with the Father before creation

Pro defined homoousios as having the same nature, and defined nature as the totality of traits and characteristics. I can only use the topic to disprove my opponent. The topic says, "Jesus is homoousios with the Father before creation." Notice the word "before." It is there to specify that this is not the case after creation. Yet as my opponent claims, God is defined as immutable(means changeless throughout time, unalterable[1]). This means that Jesus had the whole baggage of traits before and after creation, including immutability which is one of God's traits. This means that the specification of "before creation" is enough to disprove my opponent's argument, given that he implies that Jesus changed after creation.Due to the nature of this debate, I'm only required to give one valid contradiction to my opponent's claim to prove him wrong. However, I'm going to list a number of contradictions. On Omnipresence and Immutability Jesus was not omnipresent when he was in human form. However, one of God's traits is omnipresence. Note that I established above an argument that proves that we can't treat Jesus before creation differently than Jesus after creation if we assume that Jesus is homoousios to his Father.King David on God: "Where can I go from Your Spirit? Or where can I flee from Your presence? If I ascend into heaven, You are there; if I make my bed in hell [the grave], behold, You are there. If I take the wings of the morning, and dwell in the uttermost parts of the sea, even there Your hand shall lead me, and Your right hand shall hold me." [Psalm 139:7–10]"Am I a God at hand, saith the Lord, and not a God afar off? Can any hide himself in secret places that I shall not see him? saith the Lord. Do not I fill heaven and earth? saith the Lord." [Jeremiah 23:23,24] When it comes to Jesus, we are told that (1) he changed forms and thus he is not immutable like God and (2) that he was constricted in human form and not omnipresent when he was on Earth. Thus, if we assume that Jesus was immutable, we have to concede that he couldn't have changed forms and became present in just one state."[Jesus] made Himself of no reputation, taking the form of a bondservant, and coming in the likeness of men. And being found in appearance as a man, He humbled Himself and became obedient to the point of death, even the death of the cross." [Philippians 2:6]On Obedience God in the old and new testament is regarded as the highest authority and he is not obedient to anyone. However, there are many verses in the Bible which show Jesus' obedience to the Father, which means that this trait is only found in Jesus. "Father, if thou art willing, remove this cup from me; yet not my will, but thine be done." [Luke 22:42] "...[Jesus] humbled Himself and became obedient to the point of death, even the death of the cross." [Philippians 2:6]RefutationContention 1: Just as the Sun is coeval and consubstantial with its radiance so is the Father and the Son.After reading this verse, I ended up thinking that my opponent was arguing for my position. He claims that God and Jesus are of the same nature, and yet quotes something that says that Jesus-God are like the radiance and the sun which are not alike to begin with. Contention 2: "The Son is existing as the exact imprint (Greek: hupostaseos) of the Father's very being i.e. nature and personhood (Greek: hupostaseos)."My opponent has clearly misunderstood this verse, which only says that Jesus and God were equal in goodness and person, but it doesn't go anywhere near the claim that Jesus is exactly like God in all traits and characteristics. It is logically absurd to state that Son and father are "exact copies" when they have different roles and traits."God, who at various times and in various ways spoke in time past to the fathers by the prophets, has in these last days spoken to us by His Son... who being the brightness of His glory and the express image of His person, and upholding all things by the word of His power,when He had by Himself purged our sins, sat down at the right hand of the Majesty on high..." [Hebrews 1:1–3][1] dictionary.reference.com/browse/immutable