Dear Dr. Efthimios Harokopos,
Please excuse me for I have no intention of disparaging in any way any part of your essay.
I merely wish to point out that "Everything should be made as simple as possible, but not simpler." Albert Einstein (1879 - 1955) Physicist & Nobel Laureate.
Only nature could produce a reality so simple, a single cell amoeba could deal with it.
The real Universe must consist only of one unified visible infinite physical surface occurring in one infinite dimension, that am always illuminated by infinite non-surface light.
A more detailed explanation of natural reality can be found in my essay, SCORE ONE FOR SIMPLICITY. I do hope that you will read my essay and perhaps comment on its merit.
Joe Fisher, Realist