Meneldur put it quite elegantly: the only ones surprised about any of this seem to be Lurians.
Sure, Morek would be "logical" to split up... but why? They are friends with almost everyone. Not with Asylon, but hey, these guys actually tried to set up North, and were defeated. Many people dislike Asylon, and the northern realms in particular have no reason to cede them anything.
Plus, Morek is far. Why set oneself up in Morek, if it's only to be isolated from one's allies? D'Hara and Barca go back to the latter's founding, and Barca bled a lot with Fissoa against Aurvandil. Any other location than right next to both of them still would be the senseless choice. And both of these allies have all the reasons in the world to want to see Luria cut down in size, as both have been fending it off since very early Dwilight.
Sholan seems adept at fooling himself IC. It's of little surprise that the player does as much OOC.