Mark, I don’t think the file size is a problem, considering the use inside of Cinema 4D. Some lib files are several GB large. I can’t answer the question about distribution or how other artists appreciate it. On the end I would think that quality is all we care, but even today, I see the use of 8bit/channel image, which makes me always wonder why. So, yes, that is a wide question, and since on the end the results count and not how we got there, I would always say, go for it.
I’m not clear, based on your description if each material has individual files, or if they share some standards.
The other question might be, is 4K (I assume square) enough these days, given UHD as a new standard, and in Cinema Acquisition even 8K is more often used already. On the end it depends how large the objects come to the camera, etc. A longer story.
I guess you have a little beta crew, they might give you precise feedback about the whole package.
My best wishes for your project!