There are more people that played World of Warcraft, but no longer play World of Warcraft, than the number of people that currently play World of Warcraft. (Tom Chilton and Greg Street) They want to lower the barrier to entry and find some way to bring back players that no longer play. (Source)
You work out how to do that, fellas, and I reckon a LOT of game designers will sit up and take notice.
It also occurs to me as a writer the best way to stimulate myself with new ideas and discussion topics is to read more people writing about the game, so that's what I'll be doing. If you're reading this and think you'd like me to be reading your blog, gimme a shout.