1- replace the built in music player (USB / SD Card) with something better as it lacks any concept of library management. No support for playlists, albums, artist or genre.
I personally hate this, so i installed poweramp which has a Awesome library built-in feature, it also fetch cover arts of the played songs. Its library has to be a a little tweaked (one shud only add the folders in which songs are placed other wise it pick other app music sounds clips too). You steering Forward/Reverse will not work with this app but volume up/down will. This music player is premium paid app but the feature it provides justify its price which is already damn cheap i.e. 105/- = 1 USD.
2- Even if new system does not integrate with steering wheel ( next / previous ) I want to be able to set the media button on the device front to launch music player.
Just drag/drop app icons u use frequently on the screen and forget about media buttons like i have did it.
3- Be able to set default app to start when car starts (for example music , radio, blue tooth music or my smart audio book player
Same answer as Number 2.
4- I feel audio processing is too aggressive. There should be an option to turn off equalizer / booster. It smoothes the voice so much that all female singers for example start sounding the same. You can't tell it this is Madam Noor Jahan or Iqbal Bano .. you know what I mean.
Well if you install power Amp... the equaliser is very much powerful and provide extreme fine control over the music, you may use pre-sets or take control of the sound by going into "Custom" option.
5- A reasonable car maintenance app / maintenance log. If it can be linked to OBD-2 it will be great.
[I]Unknown... I didn't have it.
also you may install audio glow from play store you provide excellent sound visualisation whenever you play some music from power amp, remember audio glow only supports poweramp.
the only disadvantage is music forward/reverse from steering don't work. [/I]