Yep, exactly this. and it's not like teams don't coordinate already without needing to even talk... It doesn't take a genius to figure out if you're a DRG with LB and the DNC on your team has his up to wait for them to pop it so you can kill a group of people. People are here pretending talking is going to make that much of difference.
We already have people focus firing others in PVP by simply marking them a "1". Coordination already exists.