I use a pyramid sequencer… and this has a small page in its settings menu that can display all messages coming in and out of it.
this is SO useful!
I think something similar on the Electra One could be really useful either when developing and debugging presets - but also a useful tool when you have issues with midi on your network.
perhaps just a simple page that comes up, activated from the main settings page (where you assign usb devices)
one request: have the ability to filter messages in particular clock.
the only thing that is a pain on the pyramid version, is if you have clock running, it can make it impossible to see other messages 
of course sometimes you want to see clock … to know its coming thru.
(it may be sysex wants to also be filtered - this is not an issue on the pyramid as it throws away sysex ;))