Tim,
As to construction equipment, someone did build a course with horse and scoop in the last decade, maybe Ray Hearn or Paul Albanese, just don't remember. For most, we may want to roll back the equipment, but hold off on rolling back our equipment.....
I was taken to task for this once, by one of the more unpleasant former posters here, but I have thought about the question of how much feature design I consider when routing. In general, very little. Routing is really fitting holes together. There are only so many things we can think about at once. There will always be a few obvious ones, like a Cape Hole over a pond, Redan green on a reverse slope, etc.
And, I usually take a quick "head count" of shot types on any routing, and sometimes use that to compare to other routings prepared in the preliminary phase to see which might yield better holes. Do I have substantially more dogleg lefts than right? Do I have inherently hard holes at 1, 2, 10, 11? How many greens bend with prevailing wind, vs. against it, natural hazards left, right, short, long, etc. Not that there is a strict right answer to any of those or more.
After routing is set, I use a head count and my general design ideas to start fleshing out all the features. Again, some fairways and greens scream for one design, while others can be quite flexible, and I use those to try to attain close semblance to attain my "ideal" balance of holes.
Not sure that answers your questions, but it is an attempt to make a circular process into a more easily described simple answer.