I mostly disagree with this breakdown. The product is great if you're not making email your full-time job. I love the screening process, I find I get less spam in my inbox than I did with gmail and miss less emails that I care about. The minimalist design with only a couple of things I care about is a net positive versus other services interface that is flooded with features I don't really care about.

Really the only major gripe I've had with Hey is the lack of calendar integration. I don't give out my hey email because it is a pain to handle calendar invites, I give out my gmail and forward the emails to hey.

All of that being said, I get why power users aren't happy with hey. But I'm not sure it was made for power users, I think it was made for people who hate email and want as little of it in their life as possible.