As you might be aware, compared to past expansion, there are a lot of people dedicating their playtime for soloing and considering them as what drives them in the game. You can argue that this play base consists of mostly DKs; however, since MoP many other classes have started to do it and enjoy it.
Considering the actions by Blizzard recognizing this aspect of the game by making some fights soloable, why not implement this officially in the game? With some achievements and rewards? With some clever tricks on the development part, this aspect of the game might appeal many players as something more to pursue.
Your ideas?