This is just blowing the issue out of proporition. WOW story moves in spurts, and you only get a few times a year really to show what is happening. You can't cram every fucking race there is into that kind of format, it would just come out contrived and all over the place with too many characters. At best, Draenei since TBC should have had a quest hub possibly in WOTLK or a bigger presence in the war with the Scourge as elite paladins, and a quest hub or two in Cata.
Worgen? That's barely even happened in WOW time. It just happened last week basically. You need to actually count the number of opportunities we've had for X race's lore since they were introduced, you people act as if they've been ignored and passed over forever and ever and ever all because of 3-4 years worth of WOW time.