When you deal with cooling/heating your home, you want the best scheduling available, and the ecobee scheduling is much better than ST. This way, if there are any ST issues (as you may know by now, it happens sometimes...), your thermostat can still operate and will heat/cool your home (it can be a safety issue here especially in Summer/Winter).
The basic idea is to manage any exceptions to your normal scheduling in ST, and my automations are built upon this principle.
I've created many automations and divided them into many smartapps as I want to create as many independent & dedicated services as possible.
This way, each "micro service" can be modified & tested independently from each other: this design approach allows faster changes and less ST related platform issues (instead of creating a big smartapp that does everything and requires more maintenance).
The end users can also pick and choose the automations that they really need to meet their own use cases.
Here are some use cases (and the related smartapps):
1- Set your thermostat to 'Away' when you're not home
See the EcobeeChangeMode smartapp.
2- Resume your normal scheduling when you're back home
See the EcobeeResumeProg smartapp.
3- Turn off your thermostat(s) if your window or door (contact sensor) is open after x minutes
See the WindorOrDoorOpen smartapp
4- Adjust the ecobee setpoints based on any ST connected temp/motion sensors and/or outdoor sensor (or weatherStation)
See the MonitorAndSetEcobee smartapp
5-Orchestrate your smart vents in conjunction with your ecobee's setpoints in order to achieve the best comfort and energy efficiency by creating virtual/physical zones.
See the ecobeeSetZoneWithSchedule smartapp
6- Control your indoor humidity using your humdifier/dehumidifier/HRV/ERV
See the MonitorAndSetEcobeeHumidity smartapp
7- Set a different mimum fan time for each of your ecobee climate
See the ecobeeSetFanTime smartapp
And, much more...Most of my smartapps are available at my github or available at my store:
For more details, see this thread:
P.S. My smartapps work only with MyEcobee device, the most comprehensive ecobee implementation in ST.