Riot you should try and take in some of the composers and sound directors from Dawngate
Although it is quite different from the style of music you hear in League, Dawngate had some incredible soundtracks in it. Since the game itself is going to be put away after EA decided to suddenly pull the plug on it, there are plenty of talented people who worked on that game who I think would do great things with the League.
This is just a thought and in no way am I stating that it's the right thing to do, but if there's a chance they could, it wouldn't be something they would regret. (This doesn't just apply to sound direction there are many other areas as well.)