Recently I configured SharePoint 2016 Review release to have a deep look at the new changes contrary to 2013. During configuring user profile services I dint find User profile service Synchronization in services on server only user profile services, I checked the FIM has been removed in favor of Microsoft Identity Manager.
MIM is a separate server technology (not built-in to SharePoint Server). That means, if you have MIM running in your company, more than one SharePoint Server 2016 farm can rely upon it.
Active Directory Import (sometimes called Active Directory Direct Import) is also included with SharePoint Server 2016, and is a User Profile Synchronization alternative that will not need a separate server installation. This means that SharePoint Server 2016 offers two options for User Profile Sync.