Firstly, Eph 3:9 and Rev 4:11 do not preclude Christ from being the creator as well.Scholars have wondered if John 1 is a Gnostic corruption because it contradicts other verses. In Mark, Yahshua addresses God as a separate being who created the heavens.
Mark 13:19
because those will be days of distress unequaled from the beginning, when God created the world, until now—and never to be equaled again.
Here are also some other verses that contradict John 1.
Acts 17:24 24 “The God who made the world and everything in it is the Lord of heaven and earth and does not live in temples built by human hands. 25 And he is not served by human hands, as if he needed anything. Rather, he himself gives everyone life and breath and everything else. 26 From one man he made all the nations, that they should inhabit the whole earth; and he marked out their appointed times in history and the boundaries of their lands. 27 God did this so that they would seek him and perhaps reach out for him and find him, though he is not far from any one of us. 28 ‘For in him we live and move and have our being. ’As some of your own poets have said, ‘We are his offspring.’
29 “Therefore since we are God’s offspring, we should not think that the divine being is like gold or silver or stone—an image made by human design and skill. 30 In the past God overlooked such ignorance, but now he commands all people everywhere to repent. 31 For he has set a day when he will judge the world with justice by the man he has appointed. He has given proof of this to everyone by raising him from the dead.â€
Ephesians 3:9
and to make plain to everyone the administration of this mystery, which for ages past was kept hidden in God, who created all things.
Colossians 1:16
For in him all things were created: things in heaven and on earth, visible and invisible, whether thrones or powers or rulers or authorities; all things have been created through him and for him.
Revelation 4:11
“You are worthy, our Lord and God, to receive glory and honor and power, for you created all things, and by your will they were created and have their being.â€
Secondly, Col 1:16 is a clear reference to Christ, and one that shows direct support for John 1.
Col 1:13 Who hath delivered us from the power of darkness, and hath translated us into the kingdom of his dear Son:
Col 1:14 In whom we have redemption through his blood, even the forgiveness of sins:
Col 1:15 Who is the image of the invisible God, the firstborn of every creature:
Col 1:16 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:
Col 1:17 And he is before all things, and by him all things consist.
Col 1:18 And he is the head of the body, the church: who is the beginning, the firstborn from the dead; that in all things he might have the preeminence.
Very clearly a reference to Christ being the creator or at least involved in the creation process in some way. Again, there is no other understanding that can be had other than Christ himself was not created.
This is also all supported by 1 Cor 8:6:
1Co 8:6 But to us there is but one God, the Father, of whom are all things, and we in him; and one Lord Jesus Christ, by whom are all things, and we by him.