A couple of random thoughts before boarding the plane for Bob Cupp's memorial.....
JN just had a press link (not sure where I found it) saying he thinks golfers first and foremost like an eye pleasing golf course. So, he apparently hadn't given the stripped down thing a thought. I have, and still believe those of us growing up in the TV generation, and now video games, are just more visual than when golf began. I would say you strip out aesthetics in the name of some esoteric design theory at your peril.
Not to mention, the world isn't stripping down and golf architecture can't in many ways because of it, a la, permits, views from residential, enviro sensitivity (which you would think would mean leave more untouched, but in so many cases, means grade more to control water flow, etc.
As to bunkering, most of us find we are stripping out "unnecessary" bunkers (and maybe always have) because of budget.
As to definition, as I read architecture history, I see it as a constant upwards desire of players and architects. There may be some other factors, like busier courses, surrounding housing, etc. that has accelerated the long standing trend. Golfers want info, whether yardage books, lasers, distance markers, etc. When that idea matured, definition in golf architecture followed.
Its great that a few architects are going back to the all turf, two cut, less definition look. It might be one of the last ways to fool a pro, or maybe not, given all their other aids, maybe indecision has gone out of style for good. At the very least, I would say the world is just complicated enough that it is a great variety to have different styles, a la no definition, but won't, and perhaps shouldn't be accepted as norm everywhere.