Same issue here. The F, H, K keys have the high pitched noise problem, especially when the MacBook is hot. (if you want, I can share a video, it's quite clear from that)
This is my second machine, the first one I had replaced because the Touch ID/Power button was slightly loose and noisy when tapped! (I checked, that MacBook did not have the noisy keys problem, the keyboard was perfect)
PS
I have this machine
MacBook Pro (15-inch, 2016) with Touch Bar
2.7 GHz Intel Core i7
16 GB 2133 MHz LPDDR3
Intel HD Graphics 530 1536 MB
APPLE SSD SM0512L: Capacity: 500.28 GB
AMD Radeon Pro 455 ( VRAM (Total): 2048 MB)