The other test it seems we should apply to voting systems is how “exploitable” they are by special interests. (By “exploit”, I use the online gaming term for a player taking an action which is clearly outside the intent of the game design, but slips through the cracks and is not detected as violating a rule by the game’s programming.)
Although the use of disinformation to trick voters can’t be protected against (despite our Constitution’s framers trying), it seems to me that proportional representation from at-large voting would be less exploitable than the system we have now.
Hey, maybe as a moderate I’d actually get a voice in government, not my current red-district representative in my very blue state.
And the “Dark Money” people would be relegated to where my grandfather (a CEO) was, expounding at the dinner table about the New Deal and taxes. But at least he was a responsible principled American who paid every penny of taxes owed, wouldn’t cheat or exploit (or even give campaign contributions to the legislators from other geographies who came through his office talking about their roles in the legislation being written to regulate his industry).