I use a z-wave relay and an ESP DHT thermometer sensor with mqtt.
The DHT updates very quickly. I have an Aeotec Multisensor but found updates to be way too slow to be useful. I have 4 DHTs around the house.
The combo regulates humidity perfectly and with forecast temperatures ensures very minimal frosting on the windows during the winter.
I built it a few years ago and, at the time, finding a good z-wave/zigbee thermostat that worked with eisy/polisy was a pain. So went with esp which made the build more complicated but very reliable.
Let me know if you find a a good z-wave/zigbee thermostat.