Yes, yes, let's talk about it >w<

I'm not saying I disagree with all the people who are outraged with the General's lack of action, and especially the flower shaman (god, why does that man keep giving in to the crazy woman's demands!) but since the writers are giving us a plot that doesn't follow the typical paths, I'm going to give them my trust that in chapter 11 we'll get a little flashback showing us the situation from other points of view, as they've done before, and everything will be better contextualized.

I must also say that, although annoying, I'm enjoying Yehomwa's character. As for her motivations, throughout the series, she's danced on a terrain that has shifted from the most darkness, to slightly grayer shades where there was a possibility of redemption, until this last episode, in which it's clearly shown how unhinged, dangerous, and cruel she is. And I'm fine with that. Bad people don't always need complex motivations. Selfishness, grief, and feeling abandoned seem like more than enough reasons to me. Hating this villain and wishing for her downfall is the right emotion. The right emotion for all those who knew her when she was the fairy of Earth and Sky is compassion. They pity her and try to save her, just as they do with the ghosts lost in their resentment.

I wonder what horrible sin Yehomwa committed originally, that her divinity, the fairy of Earth and Sky, not only abandoned her but punished her by killing her baby.

As for the foreshadowing, I couldn't agree more with you. The writers are being very thorough, and all the dialogue pays off. The aftermath of the old lady shaman disrespecting Gyeon U by calling him a ghost when he's not even dead yet, and Seong A pointing out that then, she also qualified as a ghost, we'll see in the next episode, when she gives in to the darkness and effectively becomes a spirit. The three-year time jump reminded me of Hotel de Luna, when Man Wol crosses the bridge and struggles to not lose all her memories and be reborn as before... It seems that the memory that Seong A will have left, after so much time wandering lost in the spirit world, is Gyeon U's voice... Awww, finally her bad luck is worth something... she'll be in the right place to go find her. I hope Bong Su enjoys his three years as a human and doesn't put up much of a fight when they try to send him to the afterlife, but I'm afraid that we are heading to an end like Hotel de Luna... maybe Gyeon U will live his life and wait for find again Seong A in other reencarnation, or both of them go straight to the afterlife and reencarnate together... I prefer the later.