What new features would you like to see in World of Warcraft?

I play World of Warcraft a lot and was wondering if any of you had any ideas of cool new features you would like to see added. I have a few. The first would be have a new race/class unlocked when you reach the maximum level so there is even more incentive to get there. I also want player housing (which I heard they are planning on adding later on in the future) and multiple hearthstone where you could set them to come to a certain grinding area or trainer. For the new race I think they should be something fun such as a centaur or murlock race. What do you think?