Essential launched its PH1, which was design-wise ahead of the curve. But, they didn't really seem to listen to or predict the market.
First, there was no headphone jack. That's controversial, but you've probably lost what I'd guess at least 10% of your potential market by doing so(potentially as high as 40%).
Second, the camera at launch was not good. That's probably what is most important to most people. I've heard it's gotten better, but a bit late.
Last, and most importantly, it was absolutely overpriced. It brought nothing to the table to warrant its price, and probably should have been sub $500 at launch.
Each of these points can be nitpicked by saying "well Samsung/Apple/LG/Oneplus did it", but Essential is not that. They are an unknown startup company with no consumer trust. You cannot expect people to give up features and pay Samsung prices before they know who you are.
/rant