Don't be to quick to discard the Hubitat. Yes it's UI needs some working on but they have about two or three updates of the firmware each week and with new features and bugfixes, not introducing new bugs.
There are several,methods to enhance the app: Action Tiles and Sharp Tools are the most commonly used.
That said, I expect Hubitat itself to come with a much improved UI in the near future as they realize all too well that that is their weak point.
Big advantage is the very large, friendly, helpful community that gave me good answers (including 'drivers', ) for 99 % of my questions. So now, directly from Hubitat and without any extra code or hardware I control, Samsung smartthings, Honeywell thermostats, Hunter Douglas shades, Logitech Harmony remote, Netatmo etc and , of course, a stable z-wave and zigbee network. On top of that it has something called 'Hub-mesh' that gives you real unlimited coverage of your network by adding Hubitat boxes in different places of your house (and only when you buy the fifth box, you will have spent the same amount of money you spent on your HC3.
But hey, i'm not here to market Hubitat. I'm sure you have your own needs and know what you want and don't want.
Just to say that it is a huge relief to have a little box that just does what it promised and has a good future in front of it.