Agreed, EU ruins the power heirarchy that Lucas has spent a half his life developing. When you see Yoda, you are supposed to think he is the strongest Jedi of all time. You aren't supposed to think, ya he's alright for movie times, but in ancient times he would have got his ass handed to him. And anomoly, your right about palps too. When we see him on screen, we are supposed to think there has been nothing like him. No sith power as dark or as powerful as him. But all we hear is, ya he's good, but Reven or Kun or the exile would destroy him in a second.
This is why I hate EU. I don't feel I can be a true fan of the movies, and also enjoy the EU. Everytime I read something, i'm always saying, WHATEVER !!! that's not how it would be at all...
Anyway, Vader CAN use force lightning. He just doesn't in the movies. He is more of a force choke man.
It's like, I really need a chick with a nice ass. Does that mean I can't appreciate a nice set of t1ts? No.
Vader loves the force choke, but if it came down to it, he could use lightning if he wanted too. His fake hands have nothing to do with it. It's external, not internal.