The highland Wiends recognize that you have legitimately fundamental honor obligations both to your family and to your clan liege. When those conflict, it’s high drama, and they wouldn’t have a single knee-jerk reaction about which one should take precedence. On the other hand, if you break an oath for merely utilitarian reasons – like, say, saving thousands of lives, if those lives don’t include someone to whom you have a deeper debt of honor – you’d be scorned as honorless.
The reddit comment you quote (and with which I heartily agree) is aimed at text-fundamentalists. It’s worth noting that the Wiends aren’t that…the highland honor code isn’t a written code. And the highlanders are all about following the spirit rather than the letter of the law; one of their stereotypes of lowlanders is that the latter wriggle out of their promises by only adhering to what’s written down, or to precise wording that creates loopholes for them to slip through. Highlanders definitely keep to the spirit of their oaths, not just the letter. But they may well sacrifice benevolence, compassion, and humanity in the process. They’re fundamentalist in their inflexibility and prioritization of a single virtue over all others, rather than their textualism.
It’s a stable. You’ll see it in Ch 3.
Your guess is correct: none. The Outer Rim has Laconniers and Loyalists, but the Leaguers are only a presence in better-connected parts of Shayard, especially its urban trading centers.
There would be multiple wrenches in that plan. 
Have a chunk of Cerlota dialogue:
Yep. Great analogy.
I think this is an area where I’d draw a veil across the precise childbearing/adoption method involved in the arrival of a child. The MC would know, obviously, but that doesn’t mean the reader needs to. I don’t think Jev’s assigned-at-birth gender, let alone genitalia, ever needs to be known to the reader; that feels like it would be dishonoring to a character who is trying to live free of the assumptions associated with gender.
“Monarch” is widely used regardless of gender, and yes, as long as the bloodline continues, the Laconniers will be unbothered.
The sea monsters around the Xaos-lands are mostly giant jellies, created from dissipating Storms, and will not be playing a significant role of any kind in the game.
Between cities that are two days apart by boat, sure. But that’s not a lot of them. If you want speedy delivery, you need to use airmail.
As plentiful as it is in ours, but no one has done the research to tweak it Theurgically to make it safe to eat as a primary carb rather than a side dish.