This topic is a bit unclear for me. I did the following test:
Create a view and save it
Create an export just after based on that view
Delete the saved view
The result is that the export still works as opposed to breaking. My understanding then is that the export is not intrisincally linked to the saved view. That means if something structural in my view definition changes I do need to recreate the export process from scratch. Does that make sense?
The filter of the dashboard and the filter of the export button are independent. You can change the one of the export button only by recreating the export action and linking the new action to the button/process while removing the old action associated to that process.
the way ive been working to sort that requirement s to create a boolean selector for the user to fill in the dashboard which reflects both on the dashboard filter and the export action filter. Hope that helps!