If only I could afford to hire anybody. I definitely appreciate the help you're giving me, though!
It figures I missed a bunch of things related to the war. -.- That is a deeply complicated segment of the game.
There's another switch that tracks whether you tried to visit Viridius after making him mad by outing him to Griselda. I think I got everything that'd stop you from getting her to him if that other switch is on, but it's kinda difficult to make a patch for it because there are a bunch of maps, so that'll have to wait until v0.23. The timing doesn't matter on when you complete it, though. You're meant to complete it during the war, but there's no negative consequences to doing it afterward.
The Folk reappearing sounds like the switch that marks the Estate as having been destroyed rather than saved (which is a separate check from the Estate being liberated) didn't get flipped correctly, which... I can't say I'm surprised at, given everything else you've found, and that should now also be fixed for v0.23, but unfortunately I don't have an easy way to have that be fixed retroactively for existing saves. There is and event that should fix it retroactively anyway, but that same event is the one that determines if the Maid there has sacrificed herself for the Folk, and that obviously isn't working how it's intended either (though I have adjusted it a bit, so maybe that's also fixed?), so it's hard to tell if I'm missing something that's still broken or I've fixed it at this point or if it's correct and there's some other factor that's re-breaking things that I'm not seeing.
Though yes, the idea with the Estate is that if you get there fast enough, you can save everybody. The turn count on it is pretty tight, but having the Folk moved there already buys you a couple extra turns, and having the Maid still be alive buys you another couple extra turns (which is why I keep talking about her sacrificing herself; there should be a small window where she'll be dead and the Folk won't be).
That last issue with the Nithercott Estate sounds like the switch was flipped, but the transfer isn't sending you to the correct version of the maps. Which, looking at a few things, I see a couple situations where that might not happen correctly, and another thing where I just missed putting in the conditional. So that should be fixed for v0.23 as well.
You might be able to double check that by entering the wilds near the Estate and going back to the Estate from there.