I have seen a lot of complaints about not "seeing" the enemy in BF. After watching some MW vids, it hit me. BF doesn't have the guys name above his head like MW. In BF, someone has to "spot" the enemy for an orange triangle to appear above him. You can actually hide in the bushes without your name flashing in neon lights.
If you fire a non-suppressed weapon, you will be a dot on the mini-map like in MW.