WoW, the OP for this thread must be the first person I have ever heard of who managed to go from just returning to the game to being 13/13 H cleared within 3 weeks.
You should actually try wiping hundreds of times getting all of the heroics on farm in the current tier of content before you start complaining about the game being too easy. The design concept for WoW seems to be a game that is easy to learn but challenging to master. All of these people complaining about how 'easy' the game is are probably not the players who are working on the actual difficult parts of the game.