I decided to start a new thread for all this, because my new issues were getting buried at the bottom of the old one about my thermostat that died.
The good news is that with the new thermostat, there is only one lingering issue- which is just sort of a first world problem. If I try to turn the fan on, I cannot do it from a dashboard tile. However, I can do it from the device page when logged on to the hub. I can set the fan back to auto mode from either screen. So in essence, the dashboard tile is not sending the 'on' command to the device in the hub, it appears.
My previous problem with the thermostat suddenly deciding my heating setpoint needs to be 62 degrees has gone away. Not really sure what caused that to happen, but it makes me happy.
Until I can get into rule machine and create a new tile just for turning the fan on, I guess I will have to get up off my ample tuchus and do it myself.
It would be great to find a real fix for this. However, a workaround will do in a pinch.