I've not updated my main main system (3x play 5, Arc Sub and 2 x Play3 surround, Move and a Symfrnisk) to the New App instead I've created a separate smaller system with 2 x Play1 and a Roam.
With this setup I've been able to monitor the progress of the new app hopefully to a point where I'm prepared to update everything to it.
Sorry to report that it's not there yet (I've read the blog post that implies new exceeds old in responseivness - not true in my case).
Main issues with the new app on latest iPhone release 80.12.03 are.
1. Local library is never accessible from the home screen, it's there and playable via search or direct selection but the home screen always says 'no longer accessable '
2. It's still laggy, particularly when changing tracks, volume control is just about acceptable (but there shouldn't be any at all).
3. Every time on opening the app or bringing it back to foreground it briefly (sometimes many seconds) says no system found.
4. UI/UX, ok it's a matter of personal taste but I find it more difficult and slower to navigate than the old app. It may be a familiarity issue but the home screen makes little sense to me I don't want all the options it offers, generally I just want to fire up some music that I've paused. Can we have an option to REMOVE some of the standard pinned stuff as well as add services (see point 1 above though).
As a general comment I do hope that the app code is not becoming full of patches and hacks as is likely to happen when you released what was probably considered to be minimum viable product (it wasn't) and then pressure the program to feature add/fix......
Sonos I still love your sound and your hardware but you operate a closed ecosystem which is fine if your software is good, when it's not all that fantastic work by your engineering/hardware folk is wasted.
App developers I feel for you, continue to the recovery PLEASE!