Thank you for the feedback, it is definitely welcome and appreciated. I'll take care of all the items you pointed out.
As for tagging, there isn't a "Nordheim expansion" tag specifically, so I added the "extensions" tag.
I hear you about the Secret Forest Passage for Zogar Sag. Here's what I found in playtesting: I think it's kind of balanced out by extra gem the Hero recovers because of the Blood Boiling rule. and also the low gem Recovery for the Overlord keeps gems at a premium. Keep in mind that Hindering applies. So if Zogar is left alone with Conan it costs 2 movement points to escape through the Secret Forest Passage. So Zogar can still get away, but not too far. :) Also the 6 turn limit means Zogar's turn is only going to come up a couple times. So unless the Overlord decides to spend extra gems to activate him out of sequence, Conan will likely catch up to Zogar. Also Conan the Wanderer has 3 movement points so that helps him catch up as well.
I'd love to hear your thoughts when you get a chance to play it. I probably have some blind spots in regards to this scenario. I'd love for it to be enjoyed by all, with no bugs.