I'm glad you have a new and economical option that works for you. I'll wait patiently for proper IDML import.[But] you obviously haven't used Affinity Publisher or Designer or Photos. The PDFs are completely editable. Real PDF native workflow. (I seem to remember Adobe promising that some time ago.)...
And just to be clear, the Affinity apps are not converting the Adobe files. They are using the Adobe-exported PDF. So all those conversion problems? They land at Adobe's feet in the PDF process. And this is nothing like the InDesign-import-Quark debacle. (Markzware made plenty on that.)
I am having good results, thanks. We will be moving Affinity into the production arena. Any artists want to chime in here?
After decades of working in publishing, I have yet to work with a shop that used PDFs for creating and editing book-sized print layouts of any complexity.
After-the-fact pre-press adjustments? Sure thing. But what you're describing sounds like you're trying to extract raw eggs from a loaf of bread.