Have a visual representation of fields in fieldsets within Control Conter

With a entities having 100s of fields and 10s of fieldsets it becomes difficult to administer with the Control Centre's "one by one" edit approach. You cannot see the "shape" of the model.

I have an HTML extension which shows a matrix of fields v fieldset for a given entity. It also has the option to export to a spreadsheet for further analysis.

I would like this to be built into Control Center.

A bonus would be able to click on the intersections so that the field can be added/removed from the fieldset.