John,
This is indeed wonderful news for Plainfield.
I can personally attest to the amazing right to left sideslope being recaptured by Hanse on the 5th green at Fenway.
I got off to a really shaky start, and by the 5th, duck hooked into trouble way right (I'm a lefty, as you know) behind trees). Not taking the safe route back to the fairway, I caught trees ahead with two-iron second and my total distance gain was about 40 yards on the very long par four. I was left in even worse position, and played smartly to about 120 yards short of the green with my third.
Then, I remembered....
I had read about the 5th green on GCA and its tremendous right to left slope beyond the ridge that splits the green. Taking a punched down 9-iron, and aiming for the right fringe, my 4th shot came off perfectly.
It landed on the right hand slope, about halfway up the green, and about 40 feet to the right of the hole.
I tapped in the 18 incher for bogey. I was so inspired that the rest of my game fell immediately into place, and played more than respectably the rest of the way.
The greens at Plainfield are so good as they are that I'm sure it was a tough sell for Hanse and club advocates to change them in any way. Still, if he's able to bring that kind of amazing fun and options into the greens at your wonderful course that I'm sure existed originally, then the course and your membership are lucky indeed!