For devices that have multiple power sources, it would be nice to be able to tell which sources are energized. This would apply in both RouterOS and SwitchOS. Most of my routers and switches have redundant sources - in most cases a DC input plus a POE input. There is no place that will tell me if one of those fails other than killing one and hoping and praying that the other power source is working. Better yet would be a way to have the device monitor is and produce some alarm if one power source fails.
Yea, I know that this would likely require support in the hardware and not just something in software.