Wow...Y'all sure seem to complain a lot about a treaty that your realms had no reason to be able to influence. Coria fought a war against Eston, and Eston's allies joined in with them. Coria signs a peace treaty with Eston and Eston's allies should also then sign a peace treaty with Coria. Eston's the only realm that was at war with Coria that had any right to make demands of Coria.
At any rate, y'all are way wrong about Eston joining CE's sphere of influence. Kerwin knows quite clearly how much the word of Coria's leaders can be depended on. Coria and Eston growing closer in friendship and alliance is just one step in the entire upheaval of Atamara. It is easy to take a look at a peace treaty and think you know everything that is going on. Also, it is very easy to make up the thoughts of the leaders of many realms but unless you know why the diplomatic actions that are going on, you're just leaping to conclusions. I can guarantee you that things are going on in the background and stuff is shifting.
Anyway, Coria clearly lost the war, and Eston certainly gains more by making a friend than "trying" to assimilate the duchy of Barad Falas. Hammarsett being greedy and trying to take regions from Coria is the only thing slowing down the North's invasion of CE. Which I find quite amusing.
Want my prediction for this war? CE loses, simple as that. Unless some betrayals happen amongst one of the other two alliances (the non-CE ones) then it is bound to happen. However, if one of the two other alliances is broken up then the entire island will fall into chaos.
P.S. Whoever said the sword was mightier than the pen I invite to tell that to my Diplomat.