Could it be our (scientifically documented) shorter attention spans? Writers are constantly told to keep it on a 6th-grade level to keep the average reader from dumping out on your text. Many readers have a hard time keeping track of subordinate clauses and asides.
The original trilogy has been tinkered with beyond all reason. According to Wookiepedia and Wikipedia, there were some slight changes to Revenge of the Sith for home video release, but this scene was not one of them.
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