The Gnome Caves are a bit of a curse in development terms. They were there for the old Graal the Adventure. When I was LAT Admin, I assigned the levels to person after person. Most of them did nothing with it. After a while, after things like the movement and HD systems were in place, I worked on some levels for it myself. Maybe they could be reincarnated? The older levels are a bit linear, but those would work just as well (assuming dragons are brought back as baddies).

What Classic needs is a speleologist that has a passion for MMOGs.

Edit: Not sure if reincarnated is the right word for the Gnome Caves since I don't think the final boss was ever completed.