George
As per your request on my blog of 29 Aug, my comments on your essay would be as follows:
1 Your opening sentence is the start point, only the issue is not philosophical, but physical. We are part of a physical reality. The evolution of sensory systems enables us (and other organisms) to detect it. So, within that confine, the physical question is, what constitutes this and why does it alter.
2 Any explanation which attributes any form of sensing (the usual form referred to is observation) with having an impact on physical reality, &/or deems it to have some form of 'indefiniteness', and/or more than one physical form at a time, is flawed, because that is contradictory to how physical reality occurs. Furthermore, only that which constitutes the immediate preceding existent reality (whatever that is-see below), and of that, only that which is spatially immediately adjacent, can be a cause of the next existent state/reality. Physically, there can be no 'jumping' in the sequence, nor can one physical state affect another directly, unless it is spatially adjacent. So you are right to question QM. Another simple question, for example is: what is the physical reality that corresponds to wave? And at which particular point is it reality (see below, re 'spin'), ie physically existent. Because 'wave' is a composite, a sequence, of physically existent states.
3 Any representational device must have a corresponding physical existence. The issue with one particular example you alight on is not 'point like', as such. But what this can mean, given the nature of physical reality. There must be a 'point like' physical state, ie that which physically exists as at any given point in time. Otherwise there is no physical existence. There must be something, ie a definitive and discrete physical state. The issue is, what is it? It cannot be just any given elementary component (of whatever type), as such, because there is alteration. So it must be associated with the state(s) of that, as at any given point in time. For example, any given elementary component of physical reality is not 'still', there is alteration(s). An elementary component 'spins', for example. So what constitutes reality in this case? Half a spin, a whole spin? The answer must be, whatever constitutes a difference from the previous existent state, because there can only be one state at a time.
4 That is all 'easy' to say. The difficult part is to establish what is occurring. That is beyond me, but I feel that whilst you are heading in the right direction, I am not altogether sure you have got to the bottom of it.
Paul