Anyone who is experiencing stability issues, please join the hub 17.x beta. I won’t promise it will fix every issue you have, but I can say from experience on my own hub that things have been greatly improved.
Also, know that there is a group of engineers busting their ***es to make the v2 hub better. I go home and rely on my own hub to manage the devices in my house, so I am personally invested. It is my personal opinion that too many promises were made by people who weren’t responsible for the implementation, but I’ll be damned before I stop fighting to make ST the best it can be.