Wow, congratulations for the Kickstarter! I’m a bit flushed that you’re asking for my opinion, I am no phone expert.
But okay, my opinion as a random consumer. I apologise if I’ve misread anything.
You say that the phone is human-centric, but my first impression is that it looks very millennial. There’s a lot of mindfulness going on such as hitting the pause button and rescheduling tasks. The Kickstarter blurb also mentioned that new features will be added, like popular app compatibility. So for me, this phone is still a smartphone but with a specific flow to reduce distractions and build good habits. And that is fine!
But if I’m honest, I probably won’t get it. I’m not bright (definitely not HN level), but my mind is devious. It’s what makes me such a good procrastinator, and no productivity app or technique works for me. It took me a while to realise that to address this problem, I have to really introspect myself, at all times, and adjust my workflow to it. As I get better, even if tiny and slow, I feel accomplished as a person. This, not the phone’s good-habit-designed flow, is empowering.
If there’s going to be a dumb phone, then it has to assume that its users are like that already. That rather than a phone to organise their lives, it’s one that they can forget about until they really need it. Let this drive your design and then do the Apple thing: go radical and make the design so irresistible that these users are like Hell yeah, this is what I WANT. (Rather than need.)
But! I am a random consumer, comfortable with spending Saturday afternoons in my armchair. My fully stocked iPhone SE makes me a tad hypocritical too. Stepping out of my analytical/cynical zone, actually the Kickstarter looks really good, and clearly there is great interest in it. I wish you the very best luck :)