The Troll actually looks somewhat like a WoW Troll, everything else looks completely wrong. The Draenei looks more like a Locust from Stargate: Atlantis, did the guy not have any pictures to use as reference?
Edit: Oh, Chris Robinson is apparently to blame for how fucking terrible the Draenei is. Taken from the websiteDammit Chris, the Draenei could've looked good!Here to guide their designs is World of Warcraft Senior Art Director, Chris Robinson. ... He urges Walter to go 'death knight' on his Draenei
Edit 2: And apparently the person who wrote the episode summary knows jack-shit about WoW, because at one point the Draenei is described as "this undead priest".