I think camera-quality is just where you can realistically expect it.
About on par or better than cheap compacts with same sensor-size, but as you can expect it canīt compete with high-end compacts like Canon G-Series, Panasonic LX, Olympus XZ or similar (I donīt want to mention Sony RX100(II) of course which is far ahead).
On the positive side is relatively low NR of luminance-noise which leaves most fine detail intact, virtually no ugly chroma-noise without the colors being washed out up to the highest sensitivities and quite low contrast which leads to quite good DR for a phone-camera (and of course also doesnīt hide the noise by clipping to black like many other phones)
Negative is mostly the camera-app, unfortunately most other phones arenīt better here as well:
The so called "Manual" mode is a joke, on a real camera this would qualify as P-Mode as most, but certainly not M.
Why are the even give you the chance to adjust ISO while not telling you the shutter-speed the camera will use is beyond me. It is not useful to set ISO yourself when you donīt know which shutter-speed you well get. Of course a real shutter-priority-mode would be much better, but I guess thatīs to much to ask.
Superior-Auto is too limiting. I know this mode is meant for point&shoot, but I think the possibility to choose the AR you like wouldnīt be to overwhelming for beginners. And of course that you can only start superior-auto from the lockscreen or with the camera-button also is very stupid.
Besides the scene-recognition of superior-auto is also a bit hit&miss.
Also sharpening can be somewhat high, which emphasizes noise and can destroy fine detail.