If they gave more points for team work related tasks (ie healing, repair, ammo giving, resupply etc) than killing then teamwork would increase. The fact you get 2 points for a kill and one for a team task like healing, reviving etc makes the game too deathmatch like.
The game is meant to be played as squads under the command of the commander assaulting enemy positions with balanced classes in each squad. Not lone wolfs looking to rack up kills and inflate their K/D ratio.
3 points for tasks 4 *** W1n