I just watched it. I think we need to forget that the Ewok’s look like Teddy Bears. They are supposed to be dawrf Wookies. Yeah, they came out kind cute, but if you watch how they are played, there is no cuteness outside their appearance. They are tough little things, quite capable of fighting their own battles. Too much is made of their appearance. And many of them are the same actors who played the Ugnaughts and Jawas.
And frankly I don’t really see an issue with the story. Yes, Empire added a level of gray to the story, but I feel that all three put together make a nice tale of good and evil with a bit of gray in it. I think the gray carries through to the end. I think the entire tower sequence is exceptionally well written. And I didn’t really connect with Han’s story, either in TESB or ROTJ until I was old enough to experience love myself. Then his story make complete sense to me and I could relate to Han even more. I’ve always been more of a Han Solo fan than Luke Skywalker. I love the force and lightsabers, but I love the Falcon more. So Han saving Lando, dispatching Boba Fett, leading the Endor mission (and proving his leadership with his ideas and actions) are really the culmination of him coming back and saving the day in the First Death Star battle. The part with Leia completes the romance began when the two started bickering after Leia was rescued. I’ve never had a problem with ROTJ, but I do think it is the weakest of the original three, but simply because the other two are so magnificently done. I think a better director might have been able to pull some more out of it and bring it up to the level of the other two, but as we have seen since, with 9 more films, that is hard to do. I think Rogue One, The Last Jedi, and Solo come close, but don’t quite reach the stature of ROTJ. The conclusion to Vader and Palpatine’s stories are just too powerful and well done.
And as for Lucas changing the story along the way. Yeah, that does throw some quirks in, but as a long time fan of many written SF series, that is nothing new. I’ve seen glitches that would make a Star Wars fan’s head spin. So what we see in Star Wars is ignorable. I think the story glitches are as minor as all the visual glitches that are in the films.