Machine de-authorization
Using the Stork 1.0 demo on lab.isc.org, I find that after authorizing some machines, if I want to remove them from view there is no option to de-authorize them. The only option is 'Remove' which then makes them impossible to re-authorize.
It would be very useful to be able to remove some Apps temporarily from view by de-authorizing them, without losing access to them entirely. For example, if you want to just see data from a few apps that are giving you trouble, you could temporarily de-authorize the other apps to focus on just the data you want to see.