I think it would be great if we could customise the fields that are included in the export function independently from the fields that are visible in the component they’re viewing. In most of my cases if I am displaying a table of data to users I only want them to see the essentials, however when it comes to exporting the data I’d like to provide them with additional data in the export.
An alternative suggestion is perhaps the ability for users to be able to toggle on/off the fields they see in a table (with the app builder of course controlling what fields are available to the users to toggle)