Here's an idea, why not provide an area in the tower for clans to meet and group up. A customisable area for the clan that has tools and work areas to improve equipment. The clans would have to complete quests to get these stations and tools up and running. Of course this area would only be accessible by invites and clan members. It would allow clan play to become more diverse, it will inspire teamwork and it would provide players with the ability to be unique yet clearly state they belong to a close not fireteam / group.