I've actually successfully played ATE, quite a few times in my matches with him. It's all in how you play him, and yes you get bad draws. If you don't fear ATE then I'ld love to play you sometime...

YSANC, I think is one of the main cards I do have a slight issue with, but overall I think the "Design" of the deck is good. It's the Power of the deck that I feel is lacking.

Design=Path to victor, card distribution of the various elements to that victory

Power= actual gametexts and combat numbers, Total possible offense... etc (Also win loss ratios with experienced players can reflect deck power, but I have no reason to believe that Vader has been played with enough to show an accurate result with him yet in our league.)

Tim made a very good summary of the arguments here. So I don't think i need to expand anymore on most of these points.