To one thing I noticed is ROTS is making ROTJ worse! All the questions I waited for: Why did Vader turn? Did Luke & Leia's mom die? How does Leia know her mom and Luke doesn't? What is the whole story on the force ghost? All of the answers to these questions were underwhelming. We waited all these years to learn Vader was tricked, and he did everything for his wife? To me it brings down Vader alittle, but I think that is what Lucas intended to do.
Now when I watch ROTJ I notice things that were written badly in the prequels and it is definitely hurting the movie, for instance, when Leia and Luke talk about their mom, their real mom, it is such a plot error. Many people who defend Lucas say she saw Padme through the force, but to me that is lame and really lazy writing. I really thought ROTS would fullfill my appetite of Star Wars and answer all my questions, but it has made things more confusing, and has left me very unsatisfied toward the rise, fall, and redemption of Vader. I liked it better when it was the story about Luke. Oh well, I guess I have to get over it.