Refresh charging without re-opening app, system tray charge levels, bring old device support, etc.
It would be great that, when my Max Master 3 is plugged in for charging, that it updates in real time instead of closing and re-opening the app to see the progress.
It would also be great if there was an option to close to the Windows system tray and decide if it opens with Windows or not. This is mainly for the status of the battery. Alternatively, you could put a battery icon of each device's battery levels in the system tray.
The biggest thing of all would be able to have basic support for old device that still use the very old app. I have a K350 keyboard and would love to get some basic support such as battery levels and reprogramming the various keys if needed. (Also the pairing of devices with the now too old Unifying receiver).
Cheers.