The greens themselves are amazing, and there is huge variety [as with Pinehurst No. 2] even though they are all so similar in appearance to a novice. I noted many years ago that the 18th green was the only one at WFW that wasn't guarded by a bunker on both sides, though that has been changed slightly now.
If I were designing a new course, I would include more little variations of the recoveries around the greens, but Tillinghast did not build those into Winged Foot and I do not think it would be appropriate to change that today. Several other US Open type courses have added chipping areas where there were none, and it always strikes me as awkward to see them.