If rationality is on average less wrong but you think your intuition is better in a certain scenario, a mixed strategy makes sense.
No, it means your intuition is better than your rationality, and you should fix that. If your rational model is not as good as your intuition at making decisions, then it is flawed and you need to move on.
You seem to have completely missed my point.
Let's say I have 300 situations where I recorded my decision making process. I tried to use rationality to make the right decision in all of them, and kept track of whether I regretted the outcome. In 100 of these situations, my intuitions disagreed with my rational model, and I followed my rational model. If I only regret the outcome in 1 of these 100 situations, in what way does make sense to throw out my model? You can RATIONALLY decide that certain situations are not amenable to your rational framework without deciding the framework is without value.
I think we should stop talking about utility functions.
In the context of ethics for humans, anyway. In practice I find utility functions to be, at best, an occasionally useful metaphor for discussions about ethics but, at worst, an idea that some people start taking too seriously and which actively makes them worse at reasoning about ethics. To the extent that we care about causing people to become better at reasoning about ethics, it seems like we ought to be able to do better than this.
The funny part is that the failure mode I worry the most about is already an entrenched part of the Sequences: it's fake utility functions. The soft failure is people who think they know what their utility function is and say bizarre things about what this implies that they, or perhaps all people, ought to do. The hard failure is people who think they know what their utility function is and then do bizarre things. I hope the hard failure is not very common.
It seems worth reflecting on the fact that the point of the foundational LW material discussing utility functions was to make people better at reasoning about AI behavior and not about human behavior.