Adam,
Transitioning from short grass to long is easy and has NO adverse effect upon the plant.
Transitioning from long to short is the difficult part.
But, since the course closes shortly after the tournament, getting the fairway widths back to normal shouldn't be a problem since the course doesn't reopen until the following October.
ANGC is not going to provide football field width while testing PGA Tour Pros.
The original vision would have been nice if we lived in a static world, but, we don't, and from the inception, the golf course was intricately connected to the tournament. Henee, it has responded as the game has changed.
I like the concept of horizontal elasticity and believe that more clubs that host tournaments should employ it.