Shooter,
It's a sad story.
In the mid 60's RTJ was commissioned to alter the hole.
No one at GCGC seems to have a clear handle on why the change was made, though some allude to the maintainance difficulties associated with the mounding within the green.
Recently, I have tried to convince the club to restore the hole to as close as possible to the pre 60's change, with the mounds located to the exterior of the green.
Sadly, some members and some green committee members are reluctant to make more than modest changes, primarily because recent changes to the 5th and 14th green didn't turn out so well.
Even Tom Doak, who listed the hole in his book, as one of the greatest 19 golf holes no longer in existance, has been reluctant to unilaterally advocate, endorse and support the return of the hole to its original or pre 60's design.
This has certainly been one of the most frustrating, non-playing, golf experiences of my life.
Everyone who sees the situation clamors for the change, yet resistance comes from a variety of sources, including some you would never guess.