Thanks for you very interesting line of thought.
I've added you book to my cart in Amazon. It seems this book is on point for this topic. Because I order books for free shipping in batches, I'll look into other books to order - This book is #4.
What is the web address of your FQXi paper on treating the ``wave medium'' of QM and gravity?
I also tend to view mapping (transformation) formulations with great skepticism. As you demonstrated in examining Bell's theorem, such math can allow many unrecognized assumptions to creep in. I add they also allow many unphysical operations such as division by zero or even division itself. Often the easy way of considering division the inverse of a multiply mapping operation leads to complexity that may be difficult to see the physical unreality of the conclusion. The map may not even represent the territory.
Do instruments that measure objects we do not directly sense (such as an electric field) expand the territory? That is, is the map really math and physics (a human study) combined (human description or words) about the territory of the universe (physical world)? Your text body first paragraph says this I think. But this is slightly different than the abstract.
It seems you introduce the concept of zero and equality as problems in mapping. These are easy when dealing with just counting. But when units of measure are attached, things get trickier. One of the problems I had in undergrad was mixing up the units of measure. I wonder if all of physics has this problem or the allied problem of slightly changing the definition of parameters during the derivation. Is this the issue you're addressing?
Would you're development of \theta also apply the cosmological constant Einstein introduced, also to make the map agree with his assumed physical reality? Could this be argued to question general relativity mapping? Yes, I know later physics has found a use for such a constant. But the later use is the same as the original use - an ad hoc introduction to make agreement.