Tom,
Is the introduction of MORE bunkers in semi-random locations an interim solution ?
What if the problem continues to get worse ?
What if 320 becomes the number twenty years from now ?
The concept of a rollback has, inherent in that concept, static or fixed distance, whereas, saying that distance is currently maxed out, almost invites continued efforts to produce more distance on the part of the manufacturers for marketing/sales purposes.
Distance will increase.
Perhaps it won't make quantum leaps, but it will increase, and the question for you and your peers, on existing and new courses is, what can you do to retain their challenge for the best players while keeping the game fun and challenging for all others ?