The Horde already has Silvermoon all to itself. It's a Horde city. The Sunwell is already a neutral zone. I'm not even sure why you people think Silvermoon will be the focus. The Sunwell is a separate zone and the most important thing relevant to the respective story.
You want them to take another shit on Belfs by having them share more of their idientity for what reason exactly? And yeah, it's fair to assume that the Exodar will get updated as well eventually. We are still waiting for the Forsaken equivalent of the new nelf tree. When is that coming? Where is the equivalent of Gilneas on the Horde?