Filter through contacts by using labels is not ideal and adding some automation or integration flexibility for automation to it with other platforms would be amazing. (Many mistakes can be done by mixing many different types of contacts in one like this).

For example having as contact lists, ie: third-party vendors, clients, prospects, etc.  Then, based on specific criteria of these (ie: new contact, labels, category, etc) be able to automate with other integrations such as MailChimp in order to have those specific contact pushed into specific lists.