Keith, I think you have misunderstood what I am doing with the idea of the psychon. The problem I am pointing to is this. I am not actually suggesting that the "soul" is a physical entity, but I am attempting to show that in order make a define the physical in any meaningful way that excludes things like "psychons", you have to define the mental (or as you would have it, the "personal") out of the physical. You seem to be saying that there is nothing but prejudice keeping us from assigning mental properties to physical entities like the brain. But when you have to define the physical in contradistinction to the mental, I believe that you have at least a prima facie difficulty that requires some explanation.
Since the physical, at least at the base level has to be free of purpose, intentionality, subjectivity, and normativity, these things have to be bootstrapped in on higher levels. Further, these higher levels have to be necessary consequences of what is on the lower levels.
Now you seem to follow Melnyk in bootstrapping the mental into the upper levels of a physicalistic universe via some version of functionalism.
Here's a description of functionalism provided by William Vallicella.
Mental properties are functional properties. So when we say that x, a brain event say, has a mental property, all we mean is that it stands in certain causal relations to sensory inputs, behavioral outputs, and intervening brain events. So what makes the brain event mental is simply the relations in which it stands to inputs, outputs and other brain events. Once you grasp this, then you grasp that the brain event can be wholly physical in nature despite its having a mental property. Mental properties are not intrinsic but relational.
Now, the link provides some criticisms by Vallicella of this claim, but my main concern at this point is simply asking you if you think his description of functionalism is correct.