Sorry if I misunderstood your position, and thank you for clarifying it. Personally I don't see why it would be a nightmare if the US president didn't operate

Sorry if I misunderstood your position, and thank you for clarifying it. Personally I don't see why it would be a nightmare if the US president didn't operate the executive. I think voters would be a lot less worried about the "wrong" person getting elected if the president couldn't declare war or appoint SCOTUS judges, so this change might reduce some of the tribalism. As you say, every political body has the power to create crises, and the electorate should quickly see through any deliberate attempts to create one, so there seems little risk that the minimal-president role I am suggesting would attract people motivated to cause trouble.