Well for your first paragraph, I would certainly expect that the executive would follow the rulings of the judiciary. That’s just common sense. Without that, we have no protection from executive overreach. For your second paragraph I agree. Even with cases brought before them, there are jurisdiction questions. No federal judge in East Podunk should be able to rule on the entire US.
The Judicial branch needs to follow the Constitution and obey it. The executive branch being co-equal is our protection from JUDICIAL overreach. There are instances where it needs to be used in that fashion, especially in areas such as immigration where the executive branch has the constitutional authority and the judicial branch has none. I would hope that the President protects his turf as is his constitutional duty to do so. THAT is common sense and the way that our founders intended.