Tom,
I could spend all day, or part thereof coming up with a witty retort. However, the basis of my comment was not necessarily even that they be done in AutoCad or similar.
At a recent ASGCA seminar, and other places, I learned that there are many new programs out there that let you grade your vision in 3D for a graphic representation. Want to raise a 1 Ft mound in a green? Pull it up with your stylus and the 3D view changes Voila, a perfect representation of what you want to do (if you know what you want to do).
It seems to me that unless and even if you are there every single day, and I know you are not, despite the popluar image many have of you, that having an easy to generate 3D reference of your plan for the dozer guy to start with would be the ultimate tool for communication of your ideas.
And, with that ability on new Treo cell phones even, I don't think there would be any reason in the very near future not to doodle digitally and in 3D before firing up the tractors even if you are right there. You could test the visuals of several ideas in several minutes. Even if you were in the office or around the world, you could email back and forth etc.
Other than the romanticism, I see no reason not to use technology that makes visual interpretation of ideas easier and easier. The use of visuals to convey ideas for sales or construction has been an evident progression from the early days of golf architecture.
Just my opinion.