We cannot change the URL value of the List-Unsubscribe header now. The default unsubscribe page forces the Contact to be DND, so it does not work well if we want to unsubscribe from only one of multiple email newsletters or if we still want to send transactional emails.

If we can customize the URL value of the List-Unsubscribe header, it would be very good, as we could create own unsubscribe page and define the process required for unsubscribing, such as deleting tags.

I know some tools can customize it. I believe that if GHL also had a customization function, it would become a more flexible and better tool.