I have an ecobee and keep it in a fairly dumb scheduling mode. My primary use, as of now, is to integrate with home assistant so I can have data at hand to make future decisions on energy and system usage.
I tried something similar with Nest but holy crap is it a pain in the butt to integrate with home assistant, and keep the integration functioning.
> [...] integrate with home assistant so I can have data at hand to make future decisions on energy and system usage
This is actually what I've been doing. I haven't done anything actionable with the data yet, though. Beestat [0] has some great data break downs as well.
On a similar note: My house is only a single zone and I've been manually adjusting the dampers when fall / spring come around. When I find some time, I want to try to build something that will automatically adjust the dampers based on where I am in the house to create a pseudo multi zone setup with Home Assistant.
I tried something similar with Nest but holy crap is it a pain in the butt to integrate with home assistant, and keep the integration functioning.