I had a thought, the one thing that needs to be changed the most in the PT is the reveals in the OT. The main one being, Vader is Anakin. I have thought of ways to fix this, and all I've come up with is to simply remove all references to Anakin being Vader, and completely redo the Jedi Purge scene.
Vader needs to be a mystery, I want a PT where the Saga order can be maintained.