Realms surviving isn't always for the best. If Melhed is forced to sit it out for a while, and make a ton of conessions, they won't be having any more fun.
There's also no reason to place the burden fully on Thalmarkin. Just as Luria didn't find it fair that Barca should be reformed purely in Lurian lands. Riombara has plenty of land to make a viable realm for Melhed, for example.
