A giant leap into the bright future if it were possible to enter parameters and formulas, refer to the internal data of the project, create dependences between data directly when editing the table, and be able to have any custom format of tables like this all are in the Excel or Google Sheets. I face this every day, and it is my dream!
Scripts are really powerful, and your idea is great! But i think, for most of users the graphical interface is more easy to use, like it is in Excel, Google Sheets or other similar software. I understand that functionality may be to complex to be directly added to the Archicad, this is just a dream. But if we could have a direct link to Excel or GSheets with real-time sync and ability to import in Layouts as a Drawing with automatic update function - it will be really good and easier to implement, i guess!