As a huge Worgen fan, I feel that they had LOADS of potential. However, Worgen NPC's practically don't exist outside of the Worgen starting experience, and all they got as a city district was a tree in Darnassus. Until 5.2, the tree didn't even have an INNKEEPER.
Gilneas has such promise to be an awesome front between the Worgen and the forsaken, and it's been completely ignored. If Gilneas is ever revisited, I would simply say it's about damn time!