[Traab]

Originally Posted by MammonAzrael

Of course, another prime trait of Sith is arrogance - the belief that while they bested their master, they won't make the same mistakes and fall to their own apprentice. And Palpatine did a pretty impressive job hindering Vader from being more powerful (primarily in the EU...but that is also where most of Vader's plotting to overthrow his master is too). And I don't remember if it's covered in the movies or not, but wasn't Palpatine disappointed in the massive damage Vader received and his subsequent lower power?

I dont think its ever mentioned directly that palpatine is less than thrilled with how things worked out. I mean think about it. Anakin played his part, palaptine is the ruler of the galaxy, and now this potentially VERY powerful jedi, is a half crippled cyborg. So even if he DOES turn on palpatine, he is far less likely to win a direct confrontation.