I notice there's a number of feature requests already made regarding Mailchimp integration. I'd like to add another...
I would love it if displaying the Mailchimp subscription field (which gets displayed in a person's profile below their email address) could be restricted and only displayed for specified access permissions.
I believe there's an existing request for this. I'll double check and add your support if there is, or put in a new feature request for you.
Hope this helps.