Alright so I've had a chance to try the new 16-inch MBP's keyboard yesterday at the local Apple Store, and I'm disappointed, I have to say it's huge backward step to me.
While it does not feel quite as wobbly as pre-2015 keyboards, it's just lacking in clickiness and defined response compared to the butterfly keyboards (especially 2017 and up). Also don't appreciate the reduced keycap size. As a touch-typist, it's not as fast to type on, and certainly not as fun.
I've really enjoyed the typing experience on my 2016 MBP for the past three years, even more so since I've only recently had the keyboard replaced with the 2017 iteration, which has a more refined feel to it and a perhaps not quieter, but less piercing sound.
The 2018 and 2019 butterfly keyboards I've tried have felt just as pleasant to type on, if not better, while being much quieter.
Given that, and the reliability improvements made with the latest iteration (which doesn't seem to have a failure rate even worth mentioning), I must say the 2019 butterfly keyboard has to be the best keyboard Apple ever shipped.
I'd much rather have them strike more of a balance of what people appreciate about previous butterfly and scissor keyboards with that new MBP. It almost seems like they bowed to a very vocal minority, your average user has probably been fine with recent MBP keyboards.
Otherwise, seems like an awesome machine.
Barely noticeably larger, a bit heavier and the speakers are incredible. Very decent pricing.