I can't really say how many times I have exported from Data Studio without specifically having the first and last name as chosen fields. The result is having to re-do the export again. It' easy to make the assumption that FULL NAME would automatically be a field chosen when you click on ADD/REMOVE columns but it's not! Again, this results in a great looking Excel file without name identifiers.
I would suspect most people exporting do want name identifiers so at the very least why wouldn't FULL NAME be automatically included (with option to deselect it). And better yet, instead have First and Last Name autmoatcailly in list of columns to add with option to deselect (since when exporting you are likely going to sort by last name so FULL NAME is less useful).
This is a user interface pain point.