Maul was cut in half. I can't suspend my disbelief long enough to buy the idea that anyone could survive that. It just seems ridiculous. And don't even get me started on the absurdity of Anakin having an apprentice. In Episode III they wouldn't give him the rank of master, and yet according to the Clone Wars cartoon he has an apprentice. Then what exactly does the rank of master mean then? Plus I saw a preview of an episode where they froze Anakin and Obi-Wan in carbonite to help them infiltrate enemy territory. This kills any dramatic tension of being frozen in carbonite, rendering the scene with Han in ESB utterly useless. (That is, if you watch the Clone Wars and consider it canon.) The whole emotion of that scene is whether or not Han will survive the freezing process.
But the producers logic is if we do something they did in the original trilogy, especially from Empire, the fans will love it! Jedi can survive that kind of thing, because according to the prequels Jedi are nearly invincible! If there is no dramatic tension or conflict, there is no story. Which means you can have all the battles you want, but if there is no real threat of danger to characters that you care about, then there is no ultimate purpose to watching. This is why the Clone Wars is crap. I can't believe how incredibly stupid Star Wars is becoming.
I have no problem with expanding the universe of Star Wars and I have no problem with having a healthy dose of suspension of disbelief, but when you create rules in your universe at least stick to them so there is some kind of logic behind it.