When Bob Jones won the US Amateur there in 1925, the course measured near 6,900 yards. Remembering the equipment of the day, this course must have been off the charts in terms of difficulty. There is only relief in Jones's words as to having won there. In fact, Armour famously remarked in 1927, "It was a great relief when the round was over."
Roll the clock forward and today you have a course only a few hundred yards longer. The course is blessed with short two shotters like the 2nd (!), 5th (!), 11th, 14th and 17th (!!), short to medium one shotters like the 6th (!) and 13th and a superb reachable three shotter in the 4th.
All in all, this gives the course great variety and a wonderful spectrum of holes of the sort that frankly didn't play like that in the 1920s.
My vote: Oakmont has never been a more engaging course than it is today, especially for its members and the 99.999% of us who have a handicap.
Fownes might well disagree but speaking from the perspective of the less skilled, there is a much more pleasing give and take within its collection of 18 holes as they play today. Rather than just continually being bludgeoned into submission ala what I imagine 1925 must have been like, the contestants next week must continually analyze and re-analyze when to thrust and when to parry - isn't that infinitely more interesting/exciting?
Cheers,