Regarding 5, I would think an important subskill would be recognizing arbitrarity in conceptual distinctions, e.g. between belief and preference, agent and environment, computation and context, ethics and meta-ethics, et cetera. Relatedly, not taking existing conceptual frameworks and their distinctions as word of God. Word of von Neumann is a lot like word of God but still not quite.

By the way I love comments like yours here that emphasize moral uncertainty.