Not only that, but the Draenei culture is the oldest of all; millions of years old. They could have at least an entire expansion dedicated to them were it not for Metzen et all throwing their hands up in the air and saying, "Alright, the Draenei were a train wreck".
Hopefully in this next expansion, which i'm 100% certain will be a Burning Legion one at least involving Argus/the Legion homeworld, they will do them some justice.