I ask myself the same question. The battery level is nowhere to be seen unless connected to WiFi.

The whole point of being nomadic is to be 90% connected via Bluetooth, so we know whether we'll be able to use our Roam all day long.

On iOS, I don't have any indication of this level and even with the proprietary application I don't have anything accurate.

I know that Sonos is very reactive when it comes to corrections, so please let our phone's system handle this information.

Agreed! I can’t find ANY way to see the battery level in the new app on my Roam when only connected via Bluetooth. It tells me to connect to WiFi to find my system. The old app would know I was connected via Bluetooth and give me info and settings on the device. 

Agreed too. It is my first experience with Sonos and the sound is great, but the app and connectivity is very disappoknting. No way to control sound or see battery level via bluetooth. What's the point of requiring wifi!!?? Hope it will be fixed soon.