We’re at a point in the game where you can’t bring something new anymore, because its already been covered.
Worgen more or less had ALL of that covered and plenty more.
Even with Void Elves, the Alliance hasn’t really changed much. It could’ve. I’d even argue it should’ve. We should’ve seen Void Elves rewiring the brains of Horde captives to turn them into sleeper agents that would attempt to assassinate Horde leaders on sight, but act completely normal at all other times, or to drop off key Horde intelligence without ever being aware of it.
Instead all we got was, “We’re like mages, we open portals, but we call our portals, ‘Void Rifts,’ and they’re also purple.”