I think the pages of discussion over single lines are a consequence of two things. Firstly, there’s very little material to work with for TROS: no deleted scenes and a really tightly edited movie to begin with. Secondly, it’s one of the more underwhelming Star Wars movies, and the new ending of the Saga too, so there’s a strong drive to try to improve it. It winds up with everyone getting a little desperate.
To add to this, in my opinion, TROS suffers not just from a bad story, but also a pretty awful script. I’d say the majority of the lines are either awkward, or stupid, or they ret-con stuff that’s already established. So a lot of this discussion has been trying to find the worst offenders (and everyone has their own opinions of what the worst offenders are), and then trying to determine if they can be changed or removed without breaking the entire film.
And for a film that’s already being held together with twigs and paper clips, that’s a very fine line.
What’s already been accomplished is nothing short of staggering.