Turns out if I want to prioritize a room in a house to control the Nest Thermostat, only way to do that is to get a Nest Temperature Sensor. Funnily, I got two Nest Hubs which have both temperature and humidity sensors. But there's no way to use them when setting a temperature.
If google really is planning to integrate Nest into Google Home ecosystem, I think it's time to prioritize maximizing use of the existing hardware to their full potential.
The Nest hub 2nd Gen has a temperature sensor but this is only currently used with the sleep sense feature.
As this is a community forum supported by other users and community specialist's the best way of getting your thoughts, feedback or feature requests to the people that can make changes is by submitting feedback as detailed within the link below.
Thank you for your Feature Request! We’re always looking for ways to improve, and appreciate your feedback. You can send it at any time using your devices by saying, "Hey Google, send feedback," or by following the steps found here. This thread will be open for another 24 hours for any follow-up questions or concerns.