Hello, I'm an end user as well. There will not be any nest app improvements as that app is being phased out. Many of the next app function are being migrated to the Google Home app. And in fact there is a 'preview' version of some of the new features available by invite. You can request to be invited in the Google Home app itself. I believe you can do this (if my memory is correct) by going into the Google Home app and in the upper right corner click on your name (or small circle). From there click on HOME APP SETTINGs and there should be a selection for 'request preview'.
EmptyNester, thanks for sharing that helpful information.
Spedroza321, we hope you're able to get the answer that you need. To learn more about Public Preview for Google Home app, you can visit this article. Let us know if you have other questions or concerns.
We don't have any information to share about this. Keep your eye on the Google Nest Community page https://goo.gle/2JvnMRy for any updates. Please let me know if you have other questions or concerns as I will be locking this in 24 hours if I won't hear back from you again. Feel free to start a new thread and we'll be happy to help.