I have had 3.5 for a couple of weeks and over all it works very well and love the improvements here are my takes on what can be improved
I use the same apps all the time when I drive and when I make small stops or over night radio off the start up is inconsistent. I use Igo Luna for navigation,usb audio pro for music,Navradio+,ibus app for bmw settings interface, amd jbv1 for valentine one intergration. I have jbv1 set as the duel pip app with ibus set as a pip preset,igo as preset 2,navradio preset 3m I have Navradio and us audio as the music widget presets. I have all these apps autostarting via menu or through tasker. Sometimes they all start up sometimes I have to hit one of the pip preset to get those apps to start up. Be nice if everything started up Judy how it was before key was turned off.
Overlay app needs accessibility permission to start after sleep a firmware before 3.5 fixed thst most of the time.
Need more music apps to be set via music widget.
Need music controls in nav bar to never go away even during full screen.
Need a single pip button to cycle through all open apps in the second pip window.
Phone widget when you touch it goes to a full screen of all recent calls I prefer it go to the phone keyboard with phone book. I can bring this up by taping in far right corner but that is an extra step it should work the other way. Be nice to have three fav caller buttons in phone widget