BK speaks for me when it comes to being a purist regarding Stop the World.
I never saw the production y'all are talking about, and I thank the universe for this stroke of luck. I did, however, recently watch the weird movie version with Tony Tanner for the first time since seeing it on its release in the late '60s, and I was even appalled at that one. I'd remembered very little of it, and I could hardly believe how much had been done to it even then. Some of it must surely have been their attempt to make it more movie-audience friendly, but who knows. What a disappointment.