The first screenshot shows the default view, which is basically a list of selected databases plus all ACL entries.
The next screenshot shows that you can drag a column to a hotspot to categorize by that columns values. You can also configure aclEZ to expand groups and work with roles as well.
Basically the aclEZ tool shows you all the data which is also available in the catalog.nsf databases but it is current information (while catalog.nsf gets updated once a day by default) and allows you to edit the ACL easily.
I am still missing some important informations in the beta:
a) Administration-Server Settings
b) which databases have extended ACL enabled?
I could not figure out if aclEZ uses FullAccessAdmin-rights to access the databases and if it is possible to disable that.