Dota2's game sounds and audio creating Atmosphere

Was watching TI9 and this came to mind. The right mix of the stadium and the game sounds created plenty of Atmosphere. And that is critical for a spectator sports game.

For all of Riot's excellent sound and music department, the audio from the game itself feels there are more to be desired. Hollow.

I feel it has to do with the right mixing of audio channels, incorporating casters' voices and the arena's - something that TI did very well.