Well I don't know how serious Google is about hardware but they made some seriously obvious omissions.
1. Not having a MicroSD card slot is honestly no big deal, but they should have started with a 64GB option instead of 32GB if they wanted to go that route.
2. HTC made this phone, why couldn't they copy the stereo speaker setup from the HTC 10? I mean, Samsung doesn't have stereo speakers, but Samsung makes up for it by offering so much more.
3. Personal gripe, location of the fingerprint scanner is just stupid. Furthermore, I think all home buttons for any given user experience should be in the form of a tactile button (which may or may not double as a fingerprint sensor).
4. IP68 water resistance is honestly no big deal, would have been nice, but it's not a use case for most people. However given how pedestrian the rest of the phone is, you'd think this would be an extra they would toss in.
It's not exactly hard to come up with use cases that make sense, why can't they knock it out of the park? They have so many examples to learn from.