JohnK:
I believe you are exactly right, as far as you went. But what-all do you think Mackenzie was trying to accomplish when you say he was trying to entice the golfer's eye? In other words, for what purpose, or more appropriately, purposes?
Don't forget, Alister Mackenzie just may've been one of the most knowledgeable of all about the details or perhaps even the very essence of TOC.
Flynn, on the other hand, as far as we know, never ventured across the Atlantic to the other side where the beginnings of golf and architecture could be found.
What Flynn learned with golf architecture may've come more from his original mentor and employer, Hugh Wilson of Merion. Where Wilson got his fairly unique ideas about golf architecture, particularly on bunkering and its philosophy, he apparently got from the other side. Perhaps as much from the English INLAND heathlands as from the Scottish linksland.
I think, as time goes on, all of us will begin to understand better what that early really good man-made inland healthland architecture meant to those guys back then who were trying to get more natural with their architecture over here, albeit dedicatedly more scientific about it both in construction, in maintenance and most importantly in its affect on the golfer and his game.