Regarding the 18th hole...
I recall Lehman's '96 tee shot, and it was poorly-shaped for what was required. Tom is just an inveterable right-to-left player.
Still, I seem to recall Tom Doak observing that the landing area does not fit the hole very well. It is a converted Par 5, to be sure. Someone, perhaps Tom, made the comparison/contrast to 13 at Augusta. But instead of getting the slope to help, at OHCC 18, the reverse-banking hurts.
It really should not matter what par is. At Augusta, we could call 13 a Par 4 or a Par 5 and it wouldn't matter. What is important is the need for strategy and deciding, the risk/reward, and the amount of drama produced. I think ANGC is a superior hole on all of these accounts. 18 at OHCC could be the same; the green is every bit as good, but the green-surround is not.
If I were the King of OHCC, right after I wrote my letter to the USGA begging, pleading, demanding and cajoling them to do something about golf balls, I'd build a new 7th green, restore 15, and take an entirely new look at 18.