I feel like that is not a miss on design. Our company employed people who went into other businesses and collected data. They used the MacBook (RIP) and did remote data entry day in and day out. Not a single complaint, in fact when there was a complaint it was when they had to use the external keyboards when they were back at the office. Also, so you don't think they were "forced" into accepting things, they all had the option of getting the Air as well. It was kind of crazy because I personally loved the keyboards but thought I must just be odd. When the "keyboard gate" happened I polled all of our auditors and they all said they loved the keyboard compared to other laptops they used. Not sure what percentage of people we represent, but to categorically call the keyboard a miss on design seems inaccurate. (failure aside)
Interesting. I personally disliked the KB, but of course I'm just one person. However, nearly all (not all, but nearly all) the reviews I've read of it, across a wide range of publications, agreed with me, so I assumed the feeling was widespread. Further, the difference in loudness was measurable. I can't speak to what your auditors found—maybe they preferred the butterfly to other non-Mac latop keyboards because the latter weren't very good.
The better comparison would be if your auditors were asked how they felt about the butterfly vs. the (2015) MBP KB, since that's the heart of it: When people said they didn't like the butterfly, they weren't saying they liked it less than other mfr's laptop keyboards—they were saying they didn't like it as much as that on the older MBP.
Finally, the Air is a lower-end design, so it's not surprising they picked the MBP (since they weren't paying for it). I.e., they may have been picking the MBP in spite of the KB, not because of it.
Also, I expect there's a general psychological factor here, which is when you're given somethign very nice (an MBP) for free, you might be much more inclined to forgive its faults than if you had to pay for it yourself. If someone gave me an Aston Martin for free whose, say, trunk didn't close as smoothly as I'd like, I'd be much more inclined to forgive that than if I'd paid for it myself!