Bah, I'm clearly in the minority here, but I like the cartoonish art. Until I hang a projector from the ceiling and write a program to reveal room by room at 25mm scale onto my table, the dungeon maps don't hurt me. I think they look fine; they don't need to be perfect to work. I'd rather see different artists and different cartographers with different styles than everything done by the same people with the same style all the time.
All things aside, the Cauldron fold out map is still hanging in my gaming room, even though we finished the Adventure Path a while ago. That map is a great piece of work.