Few bugs that i noticed:
The old 790 icon is behind the new 793 and it's noticable.
When you try to download album art and you tick the high resolution it doesn't work if previously in settings is checked HD download, simple missed logic i think, when you check it, it uses non HD album art.
Poweramp's lock screen doesn't work
There is no OpenSL HD for wired headset only Bluetooth and USB dac.
List shuffle doesn't work
The UI is really smooth and nice, these are some bugs that i encountered and overall the sound quality somehow is worse than 790
Device: Pixel XL 2
Rom: Stock Android 9