People like to talk about macroing combat in WoW... but anyone who tries that just performs worse than someone who actually plays the game. The game is far from perfect, and the last couple expacs have definitely had their issues (Wrath remains the high-point of the game, both in terms of quality and number of subscriptions) but in the end it's still the MMO that I've found easy to enjoy for long periods of time. Continuous endgame content, story that -while mangled- actually matters to game progression, even plenty to do for casual gamers. 

If WoW's done anything right, it's continued to adapt and remain successful, despite virtually every other gaming company trying to knock them down . Outdated's probably the last term I'd use for the game, there's newer MMOs far more archaic in design than WoW is.