This is getting out of hand.
Let's look at perhaps the other most successful movie franchise around, Harry Potter. Rowling seems to get it far more than Lucas ever did.
For one thing, there's the EU. Personally, I think the Star Wars EU (really, fan fiction) is in general, very badly done. Chaotic storylines crisscrossing everywhere immediately after the Battle of Endor are one thing, but do we really need to hear about the further further adventures of our heroes? Sure, the EU licensing has made Lucas a bundle, but frankly, the entire universe is becoming hard to follow if you consider anything other than the six films to be canon, and even those are a little out of perfect continuity. Really, the OT is what defines Star Wars for a lot of people. Only the OT. These other writers have vastly changed Lucas' universe, and not for the better, I'd have to say. Cloning, Luke getting married, the Solo Children, Ahsoka - sure, people love these characters, but I think it's both laughable and pathetic at the same time.
Rowling, on the other hand, has steadfastly refused to allow anyone to write fan fiction - and as such, her story is her story, without any EU equivalent. She has defined what she wanted her world to be, and as such, she can make her own rules. There's a reason, though, that she has one of her main characters say, "No spell can awaken the dead," or something along those lines. Dead is dead, and that means dead. It also means world balance; if you think about it, no one would ever die. Say your spouse dies; no problem, just go out and clone another one. Bad speeder crash? No problem! It removes consequences from life - and to have death be permanent, well, that defines the world in the only way we know how to define it.
This is just another example of Lucas' foolishness, or greed. Maul was cool, whatever, but now he's dead. He should just stay dead - or else, there are a lot of unpleasant implications for Star Wars at large.