Hey Andy,
Great idea. After the rank information is correctly displaying the area of role reporting would be the next interesting aspect.
Here's why:
Most Lithium community assign users to roles to tell apart different groups (employees, volunteers, super users, moderators etc). And each of these role groups demand their own reporting to be catered for. Now imagine if you could easily apply role filters to the existing Power BI Lithium dashboard 
A simple inclusion of the role property in the users dataset would already serve that.
