Patrick:
In 1985, while I was still working for Pete Dye on the renovation of Piping Rock, we cut away a significant part of the green at the Short hole at Pete's suggestion, and substantially deepened the bunker at the front of the green. By that time the green was not ringed by bunkers per the original photo. I saw the photo while we were working there, but it seemed impractical to suggest a square moat of sand around the green, particularly since the superintendent mocked the idea. More importantly, this was 1985, and the work at Piping Rock was not intended to be a "restoration" -- no one had really done a restoration at that time.
Reversing what we did then would be awfully difficult now. It would take a lot of fill, and it would be difficult to match up the grade to the old green. And, more to the point, would it REALLY make the hole much better? Does every single Macdonald course need to be restored? Piping Rock's idea in 1985 was to take a Macdonald course and strengthen it for modern play ... that's not my personal cup of tea, but it's not a totally unpopular idea.
As for The Creek, when we worked on the course in the early 1990's, Gil Hanse and I restored most of the greenside bunkering. We put in a narrow walkway at the front splitting the bunker in two there, but as I see from the aerial, they've grassed in the left side of the front bunker since then. We did not have authorization from the club at that time to try and restore the green to our best guess of what it had been like (the contours have been messed with at some point, but we were told to leave them as is). Unlike the Piping Rock hole, I agree with you about The Creek's, it's hardly compelling as it is today.
As for one affecting the other ... not much. It would be hard for me to convince you how derelict a club like Piping Rock was in the mid-1980's, or how neglected The Creek had been prior to our work in 1991. The greens were so thatchy we had to run a sod cutter over them TWICE to get down to the soil. No one on Long Island took either course seriously at all, and the members didn't play them much, either. The work we did may not have been perfect restoration -- which neither club asked for -- but they've certainly come a long way in the years since.