They only have so much capacity. 2 or 3 trails at a time. Also the temps play a role. They did the best with what they got. I have never seen them blow Steins that early so it is not surprising at all.
I vaguely recall one time they surprised everyone and blew on it early in December. Maybe somewhere in the 3-5 years ago range? But yea, usually early on it is only open if natural snow allows. Other trails are more important. So I'm not surprised at all either that they don't make snow on it this early.