The new features in Couchbase Server 7.0.2 aim to enhance the security of deploying a Couchbase cluster by enforcing secure network encryption, HTTP Secure Transport Header (HSTS), and IP address family restrictions. The Enforce TLS feature ensures that all data between nodes is encrypted, while HSTS informs web-browsers to only use HTTPS connections. Additionally, the Enforce IP Address Family setting allows for more control over which IP address families are used for communication between nodes, providing a robust barrier against potential security threats.