Unsubscribe function

Are there any plans to resurrect the 'unsubscribe' function?

There is still an 'Honour unsubscribe' option in Workflow automations, but there is no unsubscribe field in contact or organisation pages.

What would be helpful:

a one-click unsubscribe option that can be included as a template field in emails
the unsub field in contact page
preferably a way that clicking the unsub button updates the field
if not, a custom setting that would send unsub requests to an email of choice

Thanks