YES, we need this. otherwise you have to party chat invite someone or run up to them hold O and then click (OPTIONS) and choose invite to fire team and on the off chance they say yes THEN you can talk to them. it would be nice to be roaming on a sparrow see a level 5 struggling to fight off some fallen and simply ask "hey need help", when he says yes you kill the fallen and can be on your way or join into a fireteam