I'm fairly certain the Treaty notes that Cearwyn was geographically ineligible, which would make Farronite ineligible.
Indeed.
As Vellos said, it's government style that ruled out Asylon. Though there was discussions of creating a new affiliated state membership in the treaty, but we never got around to it. Then we ended up realizing that we were better off on our own.
At this point, the three 'moot realm have so much history between them that adding new members would hinder the cohesion and fraternity in the institution, because of the lack of this shared background. I doubt any additions will ever be approved now, unless formed from a splitting of existing member states on friendly terms (and not just a colonization secession for foreign nobles).
