TBC is full of Draenei lore. Shattrath is a Draenei capital city, the Exodar was originally part of Tempest Keep, there are Draenei cities all over Outland, about half of the Alliance towns are Draenei-oriented, and a good portion of Outland lore is dedicated to the Draenei's presence there, even if it is due to the infamous Blizzard retconning technique.
Worgen, though, vanished after their starting zone, aside from a few NPCs here and there and some questlines that mention or briefly involve them. That quest in The Blasted Lands where you put the spirits of the Gilnean shipwreck to rest comes to mind. I feel like Gilneas became more important to the Horde than it did to the Alliance. Its second half is done on the Horde side, in the Undead zone! It makes sense, lore wise, but they really couldn't make it an Alliance quest hub, too? The Goblins got Azshara, and the Worgen got dumped off in Darkshore. Come on.