Dear Lockie,
In your essay you note that Laplace's demon cannot collect all the required info "at a certain moment " as special relativity eliminates a universal present across all space. Yes, physicists seem to compartmentalize, using, at any given moment, only a subset of physics theories that support their current effort, yet defending others in other contexts.
Your view of presentism in terms of "causal relations between energy forms (...) in the Now" matches my view.
As for ether, I believe that light propagates as disturbances in the local gravitational field, while the gravitational field defines the volume of 'space', which is an abstraction. I agree with Einstein that "There is no space absent of field."
Per your remarks on TOE's, in my opinion a TOE need not compute everything. Schultz's essay distinguishes between algorithmic patterns (essentially computable) and non-algorithmic patterns which do not place necessary limitations on knowability. I think Feynman said: "More can be known than can be proven.
I think you misunderstood my Merlin quote. Our experience of time is real, not illusion, but we must objectify as measurements to be useful in physics. Nevertheless, Mermin's approach, in order to justify SR is absurd, in my opinion. But I do agree with your summary, that clocks read time as a function of their energy, not as a function of multiple time dimensions.
What I like most in your above comment is your observation about volume, or 3-space, as real, with 1 and 2 dimensions of space being imagined. I agree completely, but haven't seen it stated that way before. Time and energy are complementary or dual, and necessary to have change. Energy, with equivalent mass, evolves in the Now, making things 'happen' in 3-space, as a consequence of being unevenly distributed. This addresses the problem of 'persistence' of local identities while pieces of persistent entities change from moment to moment (Ship of Theseus). I know that you're interested in gravity, so you might like a treatment of dynamic space: A Primordial Spacetime Metric
Welcome with your first essay. You did address fqxi's topics nicely, while adding numerous insights that I found very interesting. I hope you find my other writings interesting as well. I scored your essay, so please remember to do mine.
Edwin Eugene Klingman