About Mailchimp Integration - missing two-way integration

I see that FD has integration with MailChimp. You have to edit each contact and then add the contact to a Mailchimp list. But I don't think this is the most useful use case at all. I want an all-import function. I can do an export on FD and then import CSV on MC, but MC also has integrations (Zendesk, Zoho et al) that facilitate this, yet there's no FD integration on MC. So my suggestion: work with MC for two-way integration. Or, a function on FD that automatically exports all (or those selected) contacts into a MC list. Thanks.