I think it would be helpful to be able to toggle on/off the health of fireteam members. Not necessarily something floating over their head in your main field of view (a la Diablo games), but perhaps a small list of names with green-to-red bars next to them in you HUD. It would make it easier to know who is in trouble at a glance and get to helping them as the action unfolds. What do you think? Would this be helpful?