Okay.
First of all, the 17th hole at Pacific Dunes is NOT a better golf hole than the 15th at North Berwick. It may be prettier but it's not better. This has nothing to do with the bunkers Ran felt I left out, it has to do with the shots required and the line of the prevailing wind, which are absolutely perfectly oriented at North Berwick; the bigger topo of Pacific Dunes did not allow for that.
I believe I have mentioned before that Jim Urbina and I saw right away the possibility of building the finished 17th at Pacific Dunes on that site, but we resisted the thought, not even mentioning it by name [we agreed that we did not want to build one of those "R holes"]. However the steep slope to the left of the green and the line of the prevailing wind were at odds, and eventually we stuck the green out and let the natural tilt hold the shot up which was blowing in from left to right, in the manner of the Redan.
I would call the result a Redan hole, if pressed. But I certainly didn't want to carbon-copy it as Ran suggested so I looked to make some aspect of it different, and we decided that the nature of the wind asked for a different treatment of the back right side.
The discussion of modern Redan holes is interesting in terms of who has figured out what. I have of course seen many of them in my travels and in our consulting work, and it took me a long time to learn all the nuances, and why I liked the Redan at National so much better than some others. I tried to build one at High Pointe, but didn't get the approach right, and after playing National a few more times realized what I had done wrong so that I could do a better version down the line. [It is interesting to note that Seth Raynor didn't always get them to play right, either, despite having helped build The National's Redan at the start of his involvement with golf architecture.]
So I did learn a lot about the craft of golf architecture by comparing and contrasting Redans and why some were better than others. But I also respect the craft enough not to pull the Redan out of the drawer often.
Hopefully people like the fourth at Sebonack for what it is. Like Mr. Huckaby's example, it could have been a Redan if we had wanted to try it, but neither Jack Nicklaus nor I thought that would be appropriate with the Redan at National about 400 yards away.