Most excellent supplement! The idea for a Family Feud is pretty ingenious. I modified it and used three questions (two others from the real show itself, allowing players to answer based as their real world selves, which provided a good break from immersion). This was the highlight of my game that day, and I have this product to thank for inspiring the idea.
One suggestion is I don't quite understand how the hobgoblins make their way to level 2? Don't they need to cross drow territory? Maybe I overlooked the explanation. I haven't used that plot point yet either, as I'm thinking my players will just ask to be accompany the hobgoblins down to level 3, which would negate the entire challenge. Perhaps the hobgoblins would be much fewer in number; escaped prisoners of the drow? This might be a better justification for how they got to level 2 (and surviving the monsters in the southern parts to wrestle their way north to area 1). Might be worth updating the book for that, if I'm not neglecting another explanation.