When we playing team we don't have more time to send message like: "Behind us!" . It would be great that game would do this automatically. When human player point at enemy it will appear on screen(radar) of ally. I know it works kind of alien ability or human radar, but it requires to point at enemy.
Second think is to have small camcorder buildable far to reactor. It needs battery, so constructor must travel to it by time to time.