Let me state some of the problems with the 97 SE.
Everybody knows about Han shooting first being shite. Castrate Han, why not? Such bullshit. And it fucks with Han's character and Han is one of the best things in the trilogy, so it's pretty serious. Not to mention it fucks up one of the coolest scenes in the trilogy to fit in with bogus goody-goody morality. But what about Jabba? That Jabba was HORRIFIC. Total comical cartoon. The ROTJ Jabba had power and presence and intelligence and menace. The 97 Jabba cgi looks like it's designed purely for comical effect. Furthermore, there even seems to be some attempt to make it cutesey. That is NOT Jabba. It doesn't look or feel like the same character at all. CGIing Jabba to look like that shows a major lack of respect for the OT and what was established in ROTJ and a total lack of interest in consistency. And then there's Han stepping on Jabba's tail. Can you seriously imagine the Jabba from ROTJ letting Han live if he stepped on Jabba's tail? ROTJ Jabba was a great character, which makes the 97 ruining of him all the more tragic and awful. Mos Eisley: Lucas said he originally wanted to make it busier and bigger than he did in 77, or something like that. Well, he should have been able to see from the finished 77 film that what he ended up with in 77 was better than what he originally wanted. It had more atmosphere and flavor, that little town that he showed us. And it was more of its time. The 97 Mos Eisley is overdone and furthermore has TPM-style "comedy" and Bash Fender's ship from Shadows of the Empire stuffed in. The EU doesn't belong in the OT. Like I said, the 77 Mos Eisley was of its time. The 97 version was also flavored by its era and jars with the 1977 movie. There are multiple other very 90s-taste things in the 97 SE films that jar with the original 70s/80s films they're forced into, such the cgi Jabba and Jedi Rocks and its cartoon characters and the style of the ROTJ other-planet celebration scenes and the morality of Han shooting second.
ESB didn't have terrible problems in the SE, but scenes from ROTJ shouldn't be shoved in to ESB. Like what's Jerjerrod doing in ESB?
ROTJ has the Jedi Rocks Jabba's palace musical bit. Horrible overdone bullshit with cartoon characters who don't look real. When a cgi character comes off looking unreal it compromises the whole feel of the scene (and film) and compromises it feeling real and believable. This was a big problem with the Jabba in ANH too. And it's not the limits of CGI tech at the time or anything like that. The Jedi Rocks creatures and the ANH Jabba are done cartoon-style, so there's clearly zero real attempt to make them look real and they're clearly designed to be comical. They totally ruined Sy Snootles and that singing Yuzzum guy was horrendous. This scene craps on the whole movie. Then there's the celebrations on other planets at the end. The original end of ROTJ was very carefully designed so that the emotional mood gracefully and gradually moves from the mood of the Vader funeral pyre scene into the celebration mood, all crucially kept in the atmospheric setting of Endor at night. It works perfectly and as the closing section of the trilogy it is crucial that it work perfectly. The crass other-planet celebration scenes are shoved right in the middle of this, breaking up the flow and the atmosphere and scarring the beauty of ROTJ's ending. And then there's the change in celebration music. ROTJ's ending was the end of the trilogy and all the main characters were alive and well. It was a happy ending, despite the bittersweet element of Vader's death. But when you look at Star Wars as The Tragedy of Darth Vader it suddenly becomes sadder because Vader is the hero and he's dead. This is I think the reason for replacing the happy Yub Nub with the sadder tune the SE brought in. It's betrayal of the nature of the story and what the ending was supposed to be.
Finally, it is not valid to go back and fuck with a beloved classic like that and stuff in things from a different era that has different tastes and a different mentality. It's fucking desecration. A film is a thing of its time and it should be left that way, an expression of the cultural/social milieu of its time. When you fuck with that by putting in conspicuously later-era stuff you make something that is not genuine. A lie. Similarly, it is bullshit to make revisionist changes to the story of a classic. Nor is it valid to stick into a classic things that just don't work by the rules of the classic, such as cartoon characters into a trilogy that such characters do not not fit. Like splicing Mickey Mouse into Schindler's List. And it's not valid to put things into a classic that fuck up how it functions or ruin great characters. And this SE wasn't just meant to be a harmless alternative cut. Already in 1994 it was stated in Star Wars Insider 23 that the SE was meant to be the "definitive" version of the films. That means it supersedes the original. Think about that. A bastardized version that involves stuffing stuff from a different era into a classic being taken as the definitive version of the classic. That's total bullshite and an insult to the people who loved the classic. And in 1995 we got the "One Last Time" video/laserdisc campaign that told us that we were getting one last chance to buy the original versions of Star Wars on video/laserdisc (there was no dvd back then) because it would no longer be available after that. Think about that. The SE was being brought in and because of that the OOT would be no longer made available. In other words, the OOT was to be totally replaced and made gone. And remember this superseded replaced thing was the original form of a classic, the version beloved of millions. So this SE was a totally invalid endeavour and an insult.