I think ROTJ is on par with SW and ESB.

Any kind of comparison between the three in terms of story is stupid since the individual storylines are complementary. I think the ROTJ storyline concludes the trilogy in a great way.

Well Han and Leia took the back seat in ROTJ (compared to SW and ESB) but that most certainly doesn't mean the characters are badly written in general (as some people get the impression). It is just that other characters (and their development) are more prominent (Luke, Emperor, Jabba, Vader). ESB practically sucked Han and Leia character potential dry. To keep them going, Lucas could have postponed the love proclamation into ROTJ. But then he would degrade ESB.

Anyway I think it is great as it is. OT are my top 3 favourite films.