I remember one of the early arguments in favor of CC was better fuel economy. One of the biggest misleading sales lies I've ever saw.
I am absolutely opposed to auto steer of any fashion. Also opposed to auto brake. My concern is they will make drivers even more inattentive than they already are.....
That's not a function of the tool; rather that of the operator. My grandfather used a similar argument when they came out with windshield wipers; it will just cause people to drive too fast in the rain.