As I wrote in a previous post, I liked the Dark Lord novel for the work it did to recuperate--so to speak--some of Vader's power . . . within the bounds of reason and plausible post-Episode-III narrative, of course. The idea that Vader's cyborg nature made him some kind of cripple who'd be an easy target for any Jedi is blatant revisionism of the original movies, if you ask me. He was the major villain of the franchise until the prequels came along, and he was feared by allies and enemies alike for his power. And if we must consider Vader's power in the new light of the prequel trilogy; considering the way Yoda, Dooku and the Emperor effectively fought down opponents in the prequels, I'd say the movies have established that a prime physical body isn't as important as the power of the Force, when it comes to dueling.