Thinking from the aspect of someone who plays in Melhed but is pretty clueless of foreign diplomacy performed by Yeux, I am slightly worried that there were so many who wanted to join on Thal's side and no one on Melhed's. I am pretty sure that if Melhed would somehow do the unthinkable and started to hurt Thal real bad, and even threaten to TO Unger, Thal's perception would probably change then as well, and no effort would then be made to actually stop these other realms from joining. I am pretty sure all these vultures that are waiting would come to the feast then.
This, without a doubt, puts Melhed in a no-way-to-win situation. We are like a caged gladiator of Beluaterra. You have joy in seeing us fight, but if we fight, win and try to escape, Beluaterra will cut us down. This...well, is not that great a position for Melhed. It offers short term fun for those who play in Melhed, but for those who may have long term plans and prospects, this probably isn't very attractive. Tis why so few new nobles joined Melhed, while Thal got an abundance.