information about the temperature, free space on the sd card would be very useful.
this information could be in the system information
Try some linux tools for monitoring, such as Monitorix https://wiki.archlinux.org/index.php/Monitorix
iam with you. free space on the sd card would be very useful to show this in system information. that would be great and this single info keeps volumio slim and makes UX more better 