Don,
Tend to agree with Mike's points 1, 2 and 5. Not sure about 3 and 4. Does more fw cut enlarge the footprint even if you mow it quicker?
I also think we will see a push to gravel/permeable cart paths.
As to your questions, sure, routing to minimize what I call "non-discretionary" earthmoving (i.e. for vision, to flatten for playability if greater than 10% or to increase pitch for drainage) always helps reduce earthmoving, as does reduction of "discretionary" earthmoving after routing.
You will have to tell me what routing to take advantage of drainage patterns means. If you route in valleys, which always looks and feels good, you have to deal with water. If you route across valleys, it often helps to cut off the uphill water before it crosses greens, tees, and even fw.
Obvioulsly, putting swales between landing zones (just in front of tee, just past 300 yards) reduces some of that need. And, I agree that some old style Scottish Dykes in these kind of areas, or parallelling the fw would be a nice addition. Of course, they silt in, require maintenance, and really need to be at 2% or more, whereas pipe can be at nearly 0%. So, each has a footprint.
Also, what about all the grading regs to move water away from natural drain receptors to filter it? Some say more grading of this type is more sustainable.
Great general question. It seems to me the answers are very site specific. For instance, I know you used a lot of CB's at Wolf Point. I know you needed to! Anything you would have done differently there, environmentally speaking?