Kevin,
This is a very fascinating approach that looks at what we know, rather than what we think. If I may, I would like to offer up the premise of my last year's entry and suggest ways it might bring together various of the points you raise; The dynamic reality we all inhabit, the vectors of influences it is usefully reduced to and the issue of the reality of time and space.
We experience reality from the perspective of a theoretical point and so we model time as a sequence of events and space as a three dimensional coordinate system.
Given the temporal sequence is foundational to humanity, as the basis of narrative and linear logic, it is natural to assume it is foundational and physics incorporates this as measures of duration. The reality though is that it is the changing configuration of what is, that turns future potential into past circumstance. For example, the earth is not traveling some vector from yesterday to tomorrow, tomorrow becomes yesterday because the earth rotates.
This makes time an effect of action, similar to temperature. Time is to temperature what frequency is to amplitude. The faster clock doesn't travel into the future quicker, but it (thermodynamically) ages/burns quicker, so it recedes into the past more rapidly.
Spacetime is correlating measures of duration and distance, but duration doesn't transcend the present. It is simply what is happening between events, such as the wave cycling between peaks, or the earth rotating between sunrises. So there is no "fabric of spacetime," any more then there are giant cosmic gear wheels.
This leaves space without any physical properties to allow it to be bend/warped, or limited/bound, etc. Which does give it two attributes; Absolute and infinite. Absolute because it is inert, which we can measure as the cause of centrifugal force. Infinite because you can't limit nothing.
Now consider those two foundational human features arising from time; narrative and linear logic. Naturally we would consider them one and the same, so that temporal sequence is cause and effect, but that is not so. Yesterday doesn't cause today, anymore than one rung on a ladder causes the next. Exchange of energy is cause. As you develop in your theory of influences.
Now, as you well know, this is not a particularly linear process. While the laws of physics might determine the outcome of any situation, the cone of input is fundamentally incomplete prior to the occurrence of any event. Even if information could travel faster then light, then so would input and the problem persists. At best, time is a tapestry of interlocking threads, not any singular history and that gets to your description of there being no universal "it."
In fact, as I develop in this years entry, information defines energy and energy manifests information, so since energy is conserved, old information has to be erased, in order to create new information, thus giving rise to the "arrow of time." Therefore eventually the past becomes as unknowable as the future, so we cannot reconstruct any real history, thus making the concept of determinism even more problematic. Considering past and future do not physically/ontologically exist, even the concept of determinism(set past and future) is effectively epistemic.
I think this inherent subjectively of reality is where your essay is going, at least reading it from my particular set of references/influences!
Regards,
John Merryman