Because they made the radar the most valuable thing in PvP. Examples: "Look they're over here" ( everyone run in this direction and team shoot). Or people see the radar light up and think there's a mob coming from that direction to kill them. Run away. Whenever you see an enemy has picked up heavy or cast a super, it's run away from the red mark till it runs out. When I play with friends I tend to let the 3 of them go one direction and I'll probe another side just to give the enemy a "look". If they believe im the whole team coming from my side, then I did my job. I can double back while they flank or push from the other side. Like I said, I feel the radar has become the most useful thing in PvP. Turn it off for everyone on 4v4 and see how much slower and boring it gets.