Teams are a very important part of this game. Lots of people should be notified when there is an announcement. Currently in the game, there is no such thing. So players have to resort to using other forms of communication. Such as Discord or Facebook Group chats.
This new feature could be accessed near the storage tab and team leaders could write announcements for their teams in a tab near the War Log and Race Log.
Another feature I would like added would be live battles between team mates. This is a feature in CoC and it is so much fun to test strength against other people I know.