Love the OP of this thread, and think it is such a pity that…
And the final insult: in ROTJ Leia discovers Vader is her father! The man who tortured her, tortured Han, and blew up Alderaan is her actual father. And she has ZERO onscreen reaction to this information (she cries but that’s emotionally conflated with Luke’s issues). How awesome would it be to see Leia confront her father? But there’s just no room in the movie for this. Leia is needed elsewhere for Ewok-related reasons.
… this wasn’t explored - or even touched upon - in the Sequel Trilogy. Yet we have Anakin force-ghost visiting the likes of Ahsoka instead in post-ROTJ era TV series.