One of my favorite books is Emil Brunner's Dogmatics (Volume I) entitled "The Christian Doctrine of God."
On page 308 of his work, Brunner writes concerning Colossians 1:15-17:
"In this connexion the truth which we have already seen acquires new significance, that the world, it is true, was created THROUGH--DIA--the Son, but not BY--hUPO--the Son, that it has been created IN Him and UNTO Him, but that He Himself is never called the Creator. It has pleased God the Creator to create the world in the Son, through the Son, and unto the Son. The fact that between the Creator and the Creation there stands the Mediator of creation means that the world is an act of the freedom of God, that it does not proceed from the Logos."
While Brunner thinks that the Son of God is "eternal," he does not reason that Christ is ever called "Creator" in Scripture. He argues that the LOGOS is the mediate agent of creation or the one through whom God brings forth the KOSMOS. But the Son is never referred to as Creator in Scripture. Furthermore, not only does the apostle Paul describe the role of the LOGOS in passive verbal terms at Col 1:15-17--he does not employ hUPO to delineate the LOGOS' office vis-à-vis creation.
Brunner insists the Greek preposition hUPO demonstrates that Christ is not being identified as the Creator in Col 1:15-17. I concur with his assessment and suggest that a comprehensive study of Greek literature will support this specific point. If Paul had wanted to identify Jesus as the Creator in Col 1:15-17, it seems that he would have employed hUPO instead of DIA.