Exactly why I quit. In WoW's defense there really is a TON of things to do, but once you've exhausted the 40 man content, it turns into the same thing, week after week.
...and in Blizzard's defense, this expansion is coming right when people seem to be growing tired of the current content.
That said they should just keep cranking out more Sims titles. It's obvious people will buy them even when it seems like they are running out of ideas.