The Array editor presents it's fields in a way that can be a little confusing for user.
I would propose two changes to it's UI:
To use the usual "identification name" followed by "editable value box". Having then closer to be read as a block/unit.
Allow the user to see the array in a "programatical way" with the Xs in a line (Horizontal line), and a more "Excel way" where the Xs would be presented in columns (Vertical column).
The second point should help users trying to use excel to manage/process data that is then copied to the Construct Array editor.