Really? I was thought Zahara was meant to be a fixed circuit. If it was just a course maker region, they wouldn't have been able to promote it as being ~27km long, since the length would be random for every course generated.
One idea I have is that when people saw the new track and said they thought it had just been randomly generated by a course maker, this was interpeted as "bad" feedback and the course was sent back to the drawing board.
Even though my first impression was that the track came out of the course maker, it's really hard to say exactly what made it seem that way. Maybe it was the extreme smoothness of the track and the video, or the apparent lack of corner variety (it seemed to be all gentle curves, nothing tight or technical, no abrupt changes in turn radius). Upon looking at it more closely, I think it IS better than what the old course maker could possibly have produced. O.o
Could probably give the question a less confrontational wording: "What happened to Zahara de la Sierra?"