I like the new Room functionality and I know that this feature is "foundational", so maybe these are known issues. I added several rooms, which is pretty intuitive in the web UI.
I added all of my locks to one of the rooms. I'm not seeing them in the mobile app, however. Contact sensors seem to be missing as well. Everything else I added (dimmers, switches, my siren, etc. seem to be displayed and functional. It's a nice start and I think it's going to be very useful. BTW, this is on the Android mobile app.