ray_afraid said:

ALSO it ruins the big reveal of who and what Jabba is in Jedi.

It also takes the bite out of Jabba. Originally you got the impression that Jabba was someone you don't mess with and that Han had a total badass gangster out to get him. When we get to ROTJ, besides being surprised at his unexpected appearance, Jabba was portrayed as someone who will feed you to his pets willy nilly just for slightly irritating him. Not the kind of guy you want to take any risks with. Now in the SE we see Han stomping on Jabba's tail and showing us all from the start that Jabba is totally his bitch.