Fun
From what I saw of it, before the site went down, it'd use a kind of "radiant AI" (woooo catchphrase for the month of april) to handle monster spawns.
Plus it used a "job system" like the PnP game.
Neither of which sounds like 'fun' to me. Infact, they sound very 'Oblivionish', which is the antithetis of fun as far as i'm concerned. Also, from what i remember the original game had uber realistic graphics , which also i couldn't care less about...
<{POST_SNAPBACK}>
Then your memory is flawed, the graphics were kinda sucktastic.