Im staying on 0.64.3 for the time being as I have a fair about of sensors already exposed for temp and humidity. I’ll have a read up on generic climate but I feel like it will be alot of work arounds to acheive it, perhaps a custom component just to expose sensors with temp and humidity.
edit: Just had a quick read and it might be possible to do a generic per room with a dummy switch as you said. One consideration though is that it only seems to use a single temp sensor. Would be nice to use both a temp and humidity sensor as targets to a single generic thermostat. I might give it a go later.