Your post was good up the point of declaring a possible belief in Christ as the creator a Blasphemy.
Blasphemy, is an insult that shows contempt, disrespect or lack of reverence concerning a deity.
I would not consider the reasoned struggle to understand the nature of the individual elements of our triune God a Blasphemy. The bible clearly states all things were created through Christ.
“Col 1:16 For by Him all things were created that are in heaven and that are on earth, visible and invisible, whether thrones or dominions or principalities or powers. All things were created through Him and for Him.”
Now as to whether He is was “The Creator” at creation or it was God the Father or a synergy of the triune, that is a respectful debate and I do not see how identifying Christ as the Creator in parallel is a Blasphemy.
Honestly I believe we just do not now enough about God, and may never, to fully understand His creative nature and how it actualizes. But I do not see how it is part of the salvation doctrine nor a Blasphemy to believe Christ can also be part of the process of creation, the Triune is a much greater mystery than I think we realize, so much that we likely cannot even ask the right questions.
I agree with you totally