You know, I still have to re-watch the end. IIRC the B4 thing is unfortunately too entwined with the plot. (I still have to watch the end of Nemesis. I'm having a hard time sitting through it.)
While most people blame B4, the buggy ride and Data's death as the big flaws in the movie, I'm starting to think just making Shinzon into scary villian, not clone could be a big fix.
It's not important to the plot, just the character development. When I'm done watching, I may take a swing at this.
Is there any difference between the deleted scenes in the 1-disc edition and the 2-disc special edition?