They did update! Not all that obviously though. A true fanatic would have been digging around the site weeks before the release and bookmarking pages! It was crap trying to download it the day it was released anyway. I was up early that morning. Their servers couldn't handle the volume of downloaders, people were throwing up mirrors, but some of the files were corrupt in those copies, bleh. Got it eventually though!
The EE kicks ass. I had stopped my current game weeks ago in anticipation of the new release, not even knowing if old save games would be compatible. Luckily, they were. The inventory got a nice upgrade - it now separates alchemy ingredients from regular items, and there is a sort/stack function to keep it all organized. Load times are cut down a little bit, it seems. If I invested in some more RAM they would probably be next to nothing. Characters have more natural and fluid movements during the dialogue scenes, which is a nice touch. I can't do much more comparison, since I played so little of the original version.
Why am I posting about it instead of playing it? I'm off!