Teufel Android Widget

This is a a mini player widget for a multi room audio system, I'm designing for Raumfeld/Teufel Soundsystems. I'm not sure about this widget concept at all.
Maybe the reason, why I never uses it on Android, is because they were kind of useless. What do you think? Is it better to have quick access on your notification panel or on your home screen? What if this quick access has loads of features? How do you manage multiple rooms in one small widget? Let me know your thoughts.