Making the Quest Compass optional will give the devs the incentive to not give us decent directions.
Well, in Morrowind they seemed to try very hard to give us decent directions, but you still ended up running around for hours looking for something right under your nose, sometimes.
It would be nice with good directions, and then the ability to just turn on the Quest Compass once you got sufficiently frustrated and that damn Tomb was still nowhere in sight, and the dragon had eaten you lunch, and the mammoth had dysentery