If even just two labyrinths end up connected on the same road, there could be up to 9 meeples competing for the road, with major points at stake. And if a third labyrinth were included....
On a related note -- this is a fan expansion project I will likely never get to -- it would be fun to have some alternate labyrinth designs. At the very least, I think a labyrinth with a meeple shaped made out of Doris' houses would be a nice complement to the "C" labyrinth.

Maybe someone will take up such a project. (Where is quevy? He can call it "Extra Labyrinths" and start a fan expansion series.)