First off, I am sure this may start a debate but I was looking at our recently killed H ragnaros video (Better late than never), just before going to raid into Dragon soul, and it made me realised how much of an amazing fight H ragnaros is.
The point I am trying to say is that Blizzard is saying that they are putting too much money into content that only the hardcores (whatever that means) will see, but looking at stuff such as the LFR, it is easy to realise that these players who have very limited schedule to play do not need a lot of developpment spending to be happy.
Look at all the fights in LFR, they are litteraly all tank n Spank, you log in, DPS get loot, and if it makes you happy to play the game, then good for you but you can litterally attach any skins to any of the models in Dragon soul LFR and put it as a new fight.
We honestly need to see more fights like Heroic Ragnaros, or even Alystrazor where the mechanics are being extremely creative and the heroic modes arent just about mix/min the DPS and Healing, but how to perfect an encounter, increasing your DPS while dancing in the flames. This is what WoW is all about, amazing great raid encounters.
Finally, the question remains, yes Casual are much much more bigger audience, but since when does Blizzard wants to lower the quality of their content that is at some points absolutely amazing (Tier 11, Hrag, Halys) to attract the crowd of Angry birds.
Get back to your usual Mojo of making a great game that gets popular because it is a great game instead of making it a popular game directly by passing all quality standards.