My problem with the Jabba scene is not whether it was down to technology limits, whether it was originally intended or not etc., but simply that the info given to the audience in that scene was already given out (almost line for line) in a previous scene. Also, it makes the revealing of the Falcon moments later seem kind of pointless. I wouldn't care if Jabba looked crap or great in the scene, I don't care if Han steps on his tail or not, I dislike the scene because it is dead weight.