The user analytics page should include the capability to customize additional columns around user accounts, such as create date, last login date, and last document creation date.

The "User Usage Analytics" Screen should allow the ability to see all users in the tenant, not just ones with an action associated (i.e. if they've never created, sent, modified, etc., When I click the "Save Report" button nothing happens; should download the screen as a report that shows aggregate vs having to export all the data and try to use a pivot table for something so simple.

Need a Workspace report that shows usage by business unit.

Finally, you could add the account creation and last login / activity data in the user record as well.