My policy is to debate only what isn't completely arbitrary
based on how he handled a saberstaff WAY beyond what you've seen in the original trilogy. Vader was clearly not a 'level 9' lightsaber duelist from his miserable performance in the movies, so that disregards Lucas claim that Vader was such a skilled swordsman.
So much for Vader single-handedly killing off more than half of a conclave of Jedi Masters in the Star Wars: Purge
"Grant Allen [...] had written a book about the Evolution of the Idea of God. [...] it would be much more interesting if God wrote a book about the evolution of the idea of Grant Allen." ~ G. K. Chesterton, The Everlasting Man