Wonderful voice, as always, Donny...
But it illustrates why live harmonizer stuff rarely works with arrangers... The backing singers rarely EVER sing exactly what the lead voice does. They are often a call and response thing (like here, in several places) and support the lead singer, but with different timing.
It's really why I've never got into VH much. I don't do much Andrews Sisters or other 'Block Harmony' type stuff. It has been a dated style for well over 50 years. And I also agree with you: the less 'fakery' the better, unless you want the 'K' word used on you!
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An arranger is just a tool. What matters is what you build with it..!