I've seen a couple of other people mention this, and with the Gold Master coming, I thought I should highlight this as well. The Nebula is supposed to give a percentage chance to go in the wrong direction when traveling through it. For a while now (since Beta 5?), this doesn't seem to be happening. It does cut down on the sensor visibility, as expected. But one can move in any ol' direction whilst in the cloud without getting lost.
EDIT: Ticket submitted (#LUP-223-51161)