Dear Joseph,
I see that your essay is something what I was should to read. I clarified the problem of measurement, and I got useful references. But, why did you not give reference for t'Hooft http://igitur-archive.library.uu.nl/phys/2005-0622-152928/14728.pdf He has a similar idea of determinism of quantum theory. (I hope that this is here, otherwise this is other o'Hooft article?)
Otherwise, I have a different solution to your problem. (The seventh section.) I claim that every free will decision is a fundamental quantum phenomenon. I speak in favour of panpsychism. Thus, every quantum collapse is one decision of a primitive unit of consciousness. We see them as random, because they are not connected.
Thus, I think, with this model the measurement problem disappears?
Maybe you will object that EPR experiment cannot be explained on this way, because of superluminal effects. But I claim that spacetime is emergent, thus EPR contains three decisions, of two observers, and of one electron-spin pair.
I hope for any remark, that it will give me to think.
Best regards
Janko Kokosar