It’s interesting to think on what might have been in movies but I think it was the right call on letting the main cast including Han to survive ROTJ. If I recall correctly, it was Kasdan that also wanted or suggested that Lando should get killed by the Sarlacc to show how dangerous it was and that if he died the audience would be worried for their heroes. Ultimately, I think it was a good choice to let Lando live. We wouldn’t have gotten him and Nien Numb piloting the Falcon to destroy the DSII with Wedge tag teaming. I never get tired of watching the flipping back and forth between all their conflicts during the final battles of the film.