I found this definition of "post modern", from Wikipedia .
...postmodernism tends to refer to a cultural, intellectual, or artistic state lacking a clear central hierarchy or organizing principle and embodying extreme complexity, contradiction, ambiguity, diversity, and interconnectedness or interreferentiality.
As applied to current golf course design, this suggests that we aren't too clear about tried and true concepts of the past and we are all doing a lot of different things.
As alluded, many are not so sure the old strategic concepts work, at least not as simply as they were once envisioned because the game has changed. Simply put, frontal openings aren't quite the necessary item to reach the green that they used to be, and with high spin balls, green contours are the new frontal bunkers (i.e. we are moving the carry hazards closer to the pin, but since we can't put bunkers in the green, we are using ridges, etc. to deflect shots)
I do know that execution of any idea makes or breaks it. I can think of examples from my own work where it turns out (after several plays) that a bunker should have been slightly repositioned, a green contour slightly enhanced, etc. As the old saying goes, its the details that make the difference.
As the old joke goes,
Q. "How do you feel about the gca's execution?"
A. "I'm in favor of it!"