Occam's razor should be on your list. Not in the "Solomonoff had the right definition of complexity" sense, but in the sense that any proper probability distribution has to integrate to 1, and so for any definition of complexity satisfying a few common sense axioms the limit of your prior probability has to go to zero as the complexity goes to infinity.

I think you've oversimplified the phrasing of 6 (not your fault, though; more the fault of the English language). Although your expected value for your future estimate of P(H) should be the same as your current estimate of P(H), that doesn't imply symmetry of expected future evidence. For example, I have a very high expectation that future evidence will very slightly increase my already very strong belief that aliens are not visiting Earth; this is mostly balanced out by a very tiny expectation that future evidence will strongly decrease that belief.