This comes down to how people view Star Wars. A lot of people view Star Wars movies as basically lore-shovels, and if that’s the case, this kind of thing is to be expected. But if you view them as movies, as stories, undoing a significant point in the story undermines the story. Oedipus Rex loses some impact if immediately after, he grows back his eyes. Why Oedipus Rex was the first thing to come to mind? I don’t know.

I’m not bothered much by the neo-Imperials because nobody bought the Empire would just go away, even before the ST, and not bothered much by a New Republic falling because, since the Republic begat the Empire, returning to the Republic means a return to the Empire in some shape or form. Although TRoS doesn’t go with that route, it says the New Republic fell because Palpatine, but that’s neither here nor there.

That’s pretty much it, though. There’s no “People need to understand that things are temporary” about death, so Palpatine isn’t really a fair thing to defend this way.