To some degree, I agree with you. I'm not really into the EU so much anymore, but I recognize it as a valid part of the Star Wars universe, which is why I don't think Lucas can really "kill" Star Wars. (At least, he'd have to try a lot harder.) I would say that some of his employees, like Lucy Autrey Wilson and/or TastyTaste, have sort of taken custody of much of the Star Wars universe. Sometimes they appoint good authors to develop a part of it, sometimes not so good authors*. But they have worked continuously for many years to keep Star Wars alive -- growing, changing, keeping old fans and making new ones -- which Lucas didn't do so much during the intervening years. That's not a slight on Lucas, of course; just an observation.

* The variety of authors -- and forms -- also means that Star Wars did not, and will not soon, grow stagnant. There is enough variety in the universe that almost anyone can find a niche that they enjoy, and that same variety means that Star Wars will be able to resist catastrophes and evolve, just like a population in the natural world.