Above the columns there are filters. These can be customized through the WP API. I'd love to see an add-on to Admin Columns that allow for customization of the filters, – much the same way the columns can be customized.
I want for example to remove a filter menu for SEO ranking (added by a plugin) on certain CPT, and I want to add others based on custom fields..
Is this under consideration – or is another plugin already providing this?