The useful map for citizens that I envision would show the interconnections between the main institutions (including their bureaucracies) and how these relate to the citizens in the member countries.

Our job would be to simplify and to help anyone understand the processes - 'at a glance'. People do not read Treaties (and why should they?) because they are framed in impenetrable language for legal reasons.

A well designed gestalt picture of the processes could not contain all that we need to know. But if we could come up with a basic visual representation, then that base picture could be used to overlay different ways of looking at the EU.

As examples, the same base picture could be used to show the election processes, the flow of funds, the budgets of bureaucracies, the initiatives such as REACH, inter-member trade, etc etc

You can't be me, I'm taken