In addition to the problems with specific proposals below, many Oracular non-AI proposals are based on powerful metacomputation, e.g. Solomonoff induction or program evolution, and therefore incur the generic metacomputational hazards: they may accidentally perform morally bad computations (e.g. suffering sentient programs or human simulations), they may stumble upon and fail to sandbox an Unfriendly AI, or they may fall victim to ambient control by a superintelligence. Other unknown metacomputational hazards may also exist.

Every time I read something like this I think, "Wow okay, from a superficially point of view this sounds like a logical possibility. But is it physically possible? If so, is it economically and otherwise feasible? What evidence do you have?".

You use math like "Solomonoff induction" as if it described part of the territory rather than being symbols and syntactic rules, scribbles on paper. To use your terminology and heuristics, I think that the Kolmogorov complexity of "stumble upon and fail to sandbox an Unfriendly AI" is extremely high.