Maybe , when a flat Notes view could have an auto filter function just like in spreadsheet programs than it would be less necessary to create export functions for Notes Views.
@setviewinfo just filters the first column.
The Notes Vierw Column Header Click, should provide a Filter option, which allows the user to see the entire list in the view, or a selected value, or a conditional filter. Somewhat similar to the Data Auto-Filter option available in MS Excel.
The "Edit Rule" dialog should have an "edit" button below the "Add" button in the conditions area. If you accidently to an "AND" instead of an "OR", you have to re-enter the rule condition and there is no direct way to cut/copy/paste the existing condition.