This expansion, with the full introduction of LFR in to all raids. The easy dungeons and the world of que'able content they have made wow operate like your favorite FPS (CoD, Battlefield, etc). You can hop in a dungeon, match,raid and then hop out when you are done with little to no effort. This works well for shooters. For an MMO i think it can work great but the game needs more frequent content. My suggestion to make this game run like a shooter is to do monthly raid content.
Monthly Raid Content
Every end of the month. New content would drop. Im talkin small raids similar to ToES. We are looking at maybe 2-3 bosses per raid and heroic modes for them also. Keep the content fresh. Make the environments unique but they dont have to have a different theme. Try and make the fights different also. For instance if you have a fight that is a single boss DPS check, make the second fight with a lot of adds. Every couple months release a 3 boss raid and make the final boss have a special heroic mode.
Along with this every 3 months drop in some sort of new pvp content or new feature. I know shooters do this and release 3-4 maps every month along with sometimes new weapons and game modes. How much harder would it be for an MMO to do it? I know this doesnt allow the hardcores to zerg through the content in the month. This still gives them the benifit of capturing a world first everymonth with considerably less effort. This keeps other players from getting bored. This would allow them to release gear marginally better and add to a set bonus slowly. If 2-3 bosses launched every month then players could slowly transition from 2 piece bonus, to 4 piece, and then eventually add 6 piece.
No im not talking about making a large raid and then gating off pieces of it. I am talking about a large conflict and every raid is a small part of it. I know this might take away the epic feel of downing the final bosses but I believe the rewards of a slow drip method would outweigh the downsides. If the raids were spread out around pandaria with 2-3 boss raids in different places, it could be an extension of the quest arcs you did in that area. Sort of a completion of the final quest of that part of the zone. Similar to that giant bug you killed on the wall by pushing one button, or that worm you killed with seige weapons. This would be the culmination a portion of the zone.