It seems true that aesthetics provide an extra dimension that can lead to disagreement, conflict, misunderstanding, etc. So I agree that we’d want to be careful about it.
On the other hand that’s kind of why so much of everything is bland today, from architecture to politics. Sometimes you do want to present a bold vision that will alienate some people but perhaps rally even more. In a sense, EA already does this (it rallies a certain kind of person and puts off other kinds), and I think adding a layer of good aesthetics would make it possibly more effective at doing that. But it is a risk.
All aesthetics have to be remixing to some degree IMO, there’s no such thing as a fully new aesthetic that isn’t classical/retro/etc. in some sense. But otherwise yeah I agree with most of your points (except that classical really isn’t inherently tied to authoritarianism; it’s at least as much linked to liberalism and democracy!)