They are going to follow this thread with apprehension, then do everything we posit.
Failing that, this type of thread has me shaking my head.
A Masters-only ball immediately makes the Masters a non-major. No other sport alters the equipment for one element of a competition. No matter who wins, fans and authorities will always say "that was the Masters where the playing field changed." You can't legislate these types of things into some addled assessment of perfection. Leave it alone.
Distance is what distance is. I plan to strive for it in 10 years, when I'm 63; and in 20 years, when I'm 73.
I like green speeds that allow the contours to matter. Perhaps they can purchase a Masters-only cutting blade for ... oh wait.
I really do like slower green speeds, though.
Who cares if 13 is labeled a 5, but plays as a par 4.5? There weren't that many eagles, were there? That many birdies, were there?
Tiger showed that #5 was a par five this year, as he parred it every round.
I like the Masters the way it is, the way it was, and the way it will be. It never disappoints. It's not anyone's Open, so hands off.