These kind of things are fun to think about and tricky to solve. My thermostat in my hallway for example, if I set to 69, will turn off but it still feels cold. I used an IR thermometer to see that it is 69 right at the height of the thermostat, but is a gradient down to the floor where it is like 65. So there are thermal layers in the house. I started to put a small fan on the floor blowing up at the thermostat that will both mix the layers and blow the cold floor temp up at the thermostat. It will kick on and after a bit the whole house will be uniformly toasty :) I started to think why this kind of thing was not built in, but it would require air inlets and outlets at ground level and ceiling level and two thermometers, so it starts to sound too complicated and expensive. I see why people like in-floor heating now.