The problems are mostly in the "Long Path" bit. It's been a while since I ran it, but as I recall it was mostly "here's a really long dungeon path with some monsters in it, or adjacent to it. Wanna go after their phat loot or just bypass them?" Could be it gets better later in the middle part - I recall the rockseer thing being kinda cool. But when we played it, we never got past about half-way on account of people moving and stuff.