Kind of starting to take a genocidal tone from my perspective. The nations of Tyedu, M'chek and the Kurathene lands are all predominantly human. There's enough of both humans and elves in Jechran and the seven cities to ensure that IF M'chek and T'Nanshi were the only human and elvish nations (respectively) that neither race would be wiped out even if both those nations dissappeared. However...
Jechran and the seven cities have a culture all their own and is wholly distinct from M'chek and T'Nanshi. M'chek's culture is largely drawn from the Kurathene. Even where it is culturally distinct the fact remains that there are nation alternatives for the human race to exist within. Basically, if M'chek ran out of land once, they'll do so again. M'chek may fail to prosper but their cultural identity and race won't die out if they lose.
The same can't be said necessarily for T'Nanshi. The best they can hope for if T'Nanshi falls utterly is for the remaining elves to fold themselves into a remaining civilization until they fade away into the background entirely. Many human nations. One elven nation. M'chek's victory only forestalls the inevitable, which is that they will continue to need more land. Its assumed that if M'chek tries to take more land than what they need the Equalizers of Mikon who presently fight for them will turn against them to stop their advance.
But what happens the next time they run out of land? What exactly constitutes balance in this situation? Will the forces of balance fight for a nation every time it grows too big for its borders? What makes this time in history different? Again, run out of land once, you'll run out of land again.
How do you fix that? Convince their Valokian war commanders to relinquish power in the nation by hastening an end to the war by instituting birth control education to reduce population pressure in M'chek. Oh wait, they won't do that. Nevermind.
Guess we'll just have to wait for Drotid to make their oppourtunistic attacks on T'Nanshi into a formal war declaration and draw Deglos into the conflict on T'nanshi's side. Of course, this COULD bring in Brekon into M'cheks side which could...
You get the idea.

LMP: "That sounds ridiculous enough to be fan fiction." Zaroas: "Even worse; its canon."