I, for one, don't think they'd be tearing it up scoring-wise if the changes hadn't been made.
Read this month's Golf, with the recaps of the event over the years 1966, 76, and 86. It says Jack was hitting it 350 in '66 (sure, that's anecdotal, but still) and the number of years that people have gone really low were not all that common. Heck, one of the lower tournaments was posted by Crenshaw in his second win, which was without benefit of new technology, and by someone not noted for his great length.
I wish someone would have a little faith in those green complexes. I truly believe they are that good. Too bad Hootie and Co. don't agree.
Also, note that when Jack started ripping it up, and Bobby made his famous comment, they didn't immediately go out and add 400 yards, rough and trees!
Very few people seem to really understand the course and how it was designed. Maybe I'm not one of 'em, but I have more faith in Jones and Mackenzie than Hootie and Fazio.