@Rojo I agree that just viewing, simple editing, and eventually allowing some multi-selection and copy around would already be great (that is, a visual editor of List... is there some sort of graph way of extending it to multiple dimension spreadsheet... with a kind of mind maps exposure of the variable content...). So, how to link it all together with the individual dynamic content...
@Nasser it’s better than Mathematica has, but also very limited. Can you add it to you document content, two or three times... a la notebook way...?