The update includes a Beginner’s Playlist, which is a primer for new players, and Halloween themed weapons and skins, available for a limited time only. While the patch does add rudimentary support for clans, allowing you to form a posse and give yourself a custom logo, the development team won’t introduce many features until January 16th, “when players will be able to challenge other Clans in either ranked or unranked Clan matches.”
Here’s a video of Lead Designer Jesse Knapp talking about some of the new features.