And as I said my example about a blanket refusal to submit to blackmail was just an example. My more general point is to evaluate the expected utility of your decision theory itself, not just the individual decision.
In the situation I presented, the decision theory had no effect on the utility other than through its effect on the choice. In that case, the expected utility of the decision theory and the expected utility of the choice reduce to the same thing, so your proposal doesn't seem to help. Do you agree with that, or am I misapplying the idea somehow?
If it's worth saying, but not worth its own post (even in Discussion), then it goes here.