I've gotten involved in this many times, and it's like talking about global warming or politics..
1) I'd be ok with an equipment roll back
A) my suggestion would be to test optimization between metal woods and balls. A specific combination goes too far, they cannot be used together in competition
2) IF. A supposed tour ball is mandated, I believe you are setting up a problem. Changing equipment, balls ,etc is a hazard of many tour pros. As we learn the game, we also learn our tendencies, and make changes to our swing as well as equipment to find the best combination to compete. Let's say the 1997 Maxfli HT is the ball decided upon. Most tour players would make the switch and figure it out with new specs and have those balls available to practice at every event and their home TPC or other practice site. Honestly, there would be a number or percentage who this will kill, and a number who will excel, but the easiest switch, which WOULD take time for the majority would be made reasonable well.
What about non tour players. Less access to the equipment and practice sites, unless wealthy or fortunate, and especially after some period of time, the tour players would have used this equipment and settled in for a couple years, and kids coming out of lower levels not mandating this equipment or with access to prepare for it would be at an incredible disadvantage when they joined the tour.
At every level down we move the line of demarcation, I believe you set up a disadvantage for a group. That's why I personally, and Unscientifically prefer an across the board cut if anything
My two cents worth a penny thoughts