As a fan I never actually allowed myself to truly accept that I didn’t like the film until I started getting a sense of the ROTJ that could have been - obviously guys like Larry Kasdan and Gary Kurtz and Harrison Ford have come out in favour of Han’s sacrificial death and a generally deeper/bleaker finale.
I am still surprised when people are bringing up Kurtz when it comes to ROTJ. He was fired and replaced by Kazanjian in the middle of ESB principal photography. He basically had nothing to do with ROTJ, let alone being aware of any details such as Kasdan’s and Ford’s suggestion to kill off Han. He basically just jumped on the “ROTJ should have been darker” bandwagon years later, while probably still being resentful of his removal from ESB.
Now considering Kasdan’s and Ford’s suggestion, killing off Han would have not have made the story and the film magically any better.