The Ecobee Suite I am maintaining may well provide exactly what you want. It will expose the sensors, and also it includes a Smart Circulation Helper SmartApp that will increase/decrease the circulation time (minutes per hour) when the delta temperature in 2 or more rooms (that you select) exceeds a specified delta. There are 7 other Helper MartApps included for various other functions.
It’s a lot to consume, so I suggest starting with the documentation linked in the thread below: