A widget for the Kodi remote to select audio device destinations/sinks (e.g. HDMI, Bluetooth devices connected to Kodi etc) would be nice and handy. To date , I still rely on custom commands to switch audio output to known devices, which , though working , could be facilitated more by providing a way to quickly select and connect ad-hoc to an audio device currently connected to Kodi
You can use the tasker API and the many different custom widgets solutions to call any of your custom commands easily.