A couple of ideas for table export from ArcGIS Online / Web App Builder.
- Allow export to Excel format, not only CSV.
- The reason for that is mainly that the default separator character in the CSVs created by ArcGIS Online can cause problems when loading the file in Excel in certain language configurations. Maybe a possible improvement could involve UTF-8 encoding and/or select the custom separator character and decimal point character (basically, that the CSV formatting matches the language/region setting in the ArcGIS Online account).
- Option to export aliases, not just field names.
Also, I suggested in Choose fields when exporting table to CSV in Web App Builder the ability to export just the fields the user has marked as visible in the table view/widget.