Wow, well written! when I first came across this work, I had just started grad school, now I'm about to graduate... ... How time flies!
Though personally, I think the choice in chapter 6: 1. try to resolve the conflict peacefully and 2.prioritizing the protection of the kingdom ----shouldn't necessarily be mutually exclusive. In my opinion, to protect the kingdom, we should, one the one hand, involve using force to defend its citizens from elven attacks (including preventing tragedies like the village and the MC's replacement). On the other hand, since the elves are divided into two factions (and Maeve belongs to the more pacifist one), the human side ought to find a way to communicate with Maeve's faction, to reduce conflict or at least gather information about the elves' intentions ---- make more friends and fewer enemies.
However, choosing choice 2 immediately leads to capturing Maeve and severing the MC's only line of communication with the elves, which seems rather unwise. Meanwhile, choosing choice 1 and the next chapter suddenly reveals that "the elves are also MC's kin". But there was little depiction of the MC's sense of belonging to the elves. Aside from Maeve, there were no other elves we had a close relationship with. The elves still feel like a distant symbol ----which even causes the tragedy that befell the true child. This transition feels a bit abrupt.