I think a lot of the reduced traffic is due to the large number of resources for players to consult. There are tons of blogs, forums, guides, etc. on the web for people to find answers to their questions. Back in the old days, vanilla and BC, more people came here to simply ask questions. Over time, it has shifted to complaining about PuGs, etc., in part because the questions get answered elsewhere. There is a core group of people (and lurkers :-)) here that like to talk about the latest patch notes, etc., but the influx of new posters has slowed a lot over time. I don't think it has much to do with the game being "plain easy" at all. There's just a lot of other places to get info.