Your RotJ sounds a lot like the original plan for RotJ + original ST from the 80’s. Vader would die, the emperor would become the new bad guy, and Luke’s sister would be the new protagonist.

I’m not so much a fan of it but they also didn’t put much thought into it so there’s not much to ignore.

the link above about what the prequels should have required does a great job of describing what needed to happen to fit with OT canon. The ones that stuck out most to me is that the Empire felt older but is literally the same age as Luke. And the whole celibate monk angle for the Jedi feels like a very late development.