Re: New Star Wars animated show "Rebels" coming fall 2014
Had Vader remained healthy and intact in the body of Anakin Skywalker as seen in Episode III he would have been far stronger and more dangerous than he was as a cyborg in the era of the Original Trilogy. A Sith Lord with natural organic arms can throw Force lightning, but Vader no longer had any of his original limbs remaining at the time he was rescued from death and placed inside the life-support armor. He was no longer as quick or skilled with a lightsaber as he was when he was still Anakin and his reaction times in combat were slowed significantly. He had immense and lethal psychokinetic powers and his reach with the Dark Side when it came to foreseeing events was very potent - second only to the Emperor's - but after the near-fatal duel on Mustafar he was a shell of his former self.
Human instinct is pretty strong. You can't expect us to change overnight.
-Captain Jonathan Archer, 2151