Firstly, well done! Bluetooth is finally working correctly to play music from Spotify without pausing or speeding up /speeding down. Not so good is that the standard programs cannot be disabled, so as soon as Bluetooth connects it tries to play "music" from the SD card or internal memory. Unfortunately, this is only alarm sounds or ring tones! I cannot find any setting to stop this happening. There are also quite a few more "useless" apps that I cannot get rid of. Give us back the option to disable stock programs if we want to.
While we are at it, if the icons on the home screen were slightly larger, I wouldn't need to use the Google now launcher...