Something I've noticed over the years of these discussions is that most praise/defense of the PT centers on ways in which the PT is "better" than the OT - expanded scope, exploration of moral grey areas, etc. There's also a lot of discussion of how the PT functions as a commentary on the OT, but that strikes me as counterproductive to the idea of a 1-2-3-4-5-6 Saga. It seems to me that for the Saga to be a success, the first half can't be wildly superior to the second. It should build in quality to a climax both narrative and artistic. I've heard "It's okay to lose the shock of Vader=Anakin because we get Sidious=Palpatine which is just as good," but what I haven't heard is what the viewing of TESB gains to make up for the loss of its dramatic crux. An example of what I'm looking for would be something like, "Vader's turn from evil in RotJ is enhanced by everything we went through with the man under the mask." What does the PT bring to the table that makes something in the OT better than it was before?