I actually have an Ecobee 3 Lite for one HVAC unit and a GoControl for the other. I have the exact same rule to set temperature when Away and another rule when Home.
I use my phones as HE Presence with a small radius to determine Home & Away for HSM but I use our phones' presence on SmartThings hub on a 5mi radius geofence so that the HVAC units have time to heat or cool home before we arrive.
Have you looked at the Thermostat Scheduler?
There are lots of options for heating set points for modes, time schedules, whatever you care to pick.
There is also a section where you can define the temp when the mode is away.
Personally, I don't need it do anything with a time schedule. My simple little rule does everything that I need. I have never looked at the Thermostat Scheduler. I do have another rule when we go on vacation. My Ecobee and GoContol behave the same with this rule and I am willing to bet you will find the same for the Thermostat Scheduler. I have both units in Hold Mode at the device and rarely use the on-wall device of either the Ecobee or GoControl to make changes.
I your hub goes into 'AWAY' mode, through whatever means it does not matter, then Thermostat Scheduler will reflect what ever settings you have for AWAY mode.