JES II,
The problem with reverting to one tee is the current perception of the game as it relates to "PAR"
If one returns to the old days, the next hole was played from within a short distance from where the player had just holed out. It took almost 100 years to increase the teeing distance permited from within "one" club length to within "two" club lengths, of the hole.
Can you picture golf today, if EVERYONE had to tee off from a spot no more then 25 yards from the previous hole.
The next question is, if that rule existed today, would architects be hard pressed to create features meant to interface with every level of golfer, and would the cost to design and construct a golf course be much higher.
Mulitiple tees seem to be a way to force every level of golfer to confront the same architectural features, whereas, one tee would force the architect to build mulitiple features for every level of golfer to confront.
Maybe, that's why we love some of those old courses so much. # 15, # 17, # 18 and # 8 at NGLA seem to embody that theory. Come to think of it, so does almost every other hole.