No, it really hasn't. Yeah, subscriber numbers have come down a little bit, but that's expected with a 7 year-old MMO. People can only play a game for so long before it loses its appeal. They can blame the expansions and the changes WoW made all they want, but the reality is that WoW has only gotten better over the years. It's their impression of it that has gotten worse simply because they've played it too long.