In 4.0.0 alpha, various changes were introduced related to connection management. As the amount of available features grew, so did the corresponding pages on the admin panel. By now, the admin panel pages for client-to-server, server-to-server, external component and connection manager have become cluttered. Inexperienced users won't be able to make head or tails from this.
We should clean up the pages, hiding more advanced features (such as TLS configuration and buffer settings) in such a way that they won't pop up immediately.
User privacynow reports that the mutual authentication selection does not persist after a save. That should be addressed as well.