Hi Jens,
Thanks for reading, and for your great comments. It isn't that I am proposing a quantum mechanical framework of noncollapsing wave functions -- it's that I am trying to explain (like Joy) the appearance of quantum phenomena in a classical framework. Bell's framework is itself classical.
The symmetry of Schrodinger's wave equation is already there -- as a continuous wave function with solutions in both past and future (retarded and advanced). This is entirely unrelated to, and incompatible with, the probability function in quantum mechanics.
The only significant disagreement that Joy and I have had, is whether Bell's theorem proves anything at all. (That significance is blunted, however, by our larger agreement that the measurement domain of Joy's topological framework is complete and Bell's is not.)
I think that Bell's theorem does prove that no classical theory of continuous measurement functions can be derived from quantum rules -- which brings us to your research program. I don't have a problem with limiting the domain of quantum mechanical functions to an incomplete space of probabilistic measure, so long as one does not interpret the probability function as physical law. There are quite useful applications for quantum probability that should not -- and do not -- imply complete functions. That is, state preparation of the Schrodinger's cat experiment demands only one state, not a superposition -- the cat is always alive initially. There is no warrant to believe that observing its later state has causal efficacy, unless one were able to impose the symmetrical state of preparing a dead cat for the initial condition in expectation that the cat could be observed alive at some later time. By laws of thermodynamics and information conservation, this would require an infinite amount of time.
It follows that finite state calculations are always arbitrary and incomplete. This does not obviate correlation of quantum states in classically continuous measurement functions, as Joy Christian has shown.
Best,
Tom