I mean, that's the point of Fargrave right? To be the nexus of Oblivion, not the nexus of both ends of the Deadlands and one end of Leyawiin.
I get that it might not sit well to have a portal to a zone you might not own yet, or have not unlocked yet in the case of Coldharbour. Just have the portal not present in those cases until it is available.
This just makes sense to me as more sensible worldbuilding, and it gets more use out of the regions beyond their one story. Fargrave is cool, and it could be used better.