Having watched the full video (found it here: https://www.twitch.tv/directory/game/Caverns%20of%20Xaskazien/videos/all), I think you're right - maybe I'll try doubling their hesitation to enter dangerous squares.
Also spotted 8 errors in the game via his stream! Free playtesting! Hopefully I can repair them soon.
Thanks for calling my attention to it, and thanks to Dynast for playing and recording!