Your comments about the ending of ROTJ lead me to believe you didn't grow up with the the original version, possibly the special edition was your first exposure to the film - forgive me if I'm wrong. That would be the only reason upon seeing the "Yub Nub" ending you thought "that's it?"

For the rest of us who grew up with the original film it was simply the only ending of the film and the way I see it it was a product of its time. To me it would be like removing or replacing The Power of Love from Back to the Future because the song is dated and Hewy Lewis and the News are so not cool anymore.

Sure Yub Nub is 'kiddy' but uh that's the Ewoks. If one didn't realise that an hour into the movie the ending isn't going to save it.

Personally I like Yub Nub because I think it's funny (I'm laughing with it not at it) and it's so ridiculously upbeat how can you not like it.