You said much but informed little. And you deliberately obfuscated and behind all the fluff, tried to hide the most important part, whether KJV, NASB, or Amplified, they all say similar...
has in these last days spoken [with finality] to us in [the person of One who is by His character and nature] His Son [namely Jesus], whom He appointed heir and lawful owner of all things, through whom also He created the universe [that is, the universe as a space-time-matter continuum]. AMPL.
“Hath in these last days spoken unto us by his Son, whom he hath appointed heir of all things, by whom also he made the worlds; ”
Hebrews 1:2 KJV
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but in these last days he has spoken to us by his Son, whom he appointed heir of all things, and through whom also he made the universe. NIV
And then there's this...
“16 For by him were all things created, that are in heaven, and that are in earth, visible and invisible, whether they be thrones, or dominions, or principalities, or powers: all things were created by him, and for him: 17 And he is before all things, and by him all things consist. ”
Colossians 1:16-17 KJV
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There's nothing in the above KJV that is archaic, and couldn't be readily understood by a child. If Christ created all things, He didn't create Himself.
The “signs” that John gave (see John 20:30,31) were signs of Christ’s divinity. Under the inspiration of the Holy Spirit he was led of God to show that Christ was the divine Son of God. This can clearly be seen in his opening words: “In the beginning was the Word, and the Word was with God, and the Word was God.” John 1:1 In order to fulfil the purpose in writing his Gospel (that Jesus was the Christ, the Son of God), the very first thing that the Holy Spirit led John to write was that Christ, in His pre-existence, “was God”. From the outset therefore, John was saying to his readers that there are two divine personages who are both rightly termed God (Gr. Theos). This was the opening thrust of his Gospel. John then proceeded to reinforce his opening words. He did this by saying that all things were made by the Word and without him was not any thing made that was made (John 1:3). Christ therefore, says John, is our Creator. This is the highest possible claim to divinity. Only divinity is not created. These are amongst the opening thoughts that John sought to impress on the minds of those who would read his Gospel. First he shows that Christ is God (1:1). Secondly he shows that Christ was in the beginning with God (1:2). Thirdly he says that Christ is our Creator (1:3). These opening words are the very foundation for everything else he would write. It is said that John’s Gospel is written in easy-to-understand Greek – also that he uses a comparatively small vocabulary of around 600 words. This having been said, its simplicity contains the most profound truths given to man. These truths, down through the centuries, have captivated the minds of the most able of the world’s theologians and scholars yet at the same time they have been understood by children. Its profundity lies in its simplicity of thought.