Currently there's the option to play a library shuffled from the context menu of it's entry in the "navigator" panel element:
The same option isn't available in the context menu of the Inbox entry however:
The same thing is
acheivable from a context menu in the "thumbnail browser" panel element (see below) but it would be nice for that panel being visible to not be a requirement.
This might be a consideration for History too, and possibly even Podcasts, but my motivation is to have the option for Inbox.
For context, my Soundcloud stream is automatically downloaded and added to my Inbox where I listen to them before choosing whether to add them to my library or delete.