In other words, it doesn't require much skills except to shoot first. A real competitive FPS would not only require you to shoot first, but also to better aim (headshot).
In Crysis 2, it takes 2 headshots with the Scar or only 4 shots in the body. Considering the accuracy and power of the Scar, there isn't much difference between the time it takes to perform 2 headshots or 4 bodyshots; it only requires twice the skills than just shooting first and that can't balance latency issues.
Headshots absolutely need to be more important than they are right now. To solve that competitive issue, I suggest that we add more health to the characters. It wouldn't take more hit to kill with a headshot, but it would take more hit in the body. That way, it would offer enough time for the game to compensate for the basic latency issues. That way, it would really take some skills to eliminate one or multiple opponents, the game will be properly challenging, fair, less random and fun.
Ex:
Scar
NORMAL
2 headshots = kill
6 bodyshots = kill
ARMOR
3 headshots = kill
8 bodyshots = kill
Otherwise, the actual system can't be representative of the skill factors required in competitive gaming and Crysis 2 would remain a dumbed down FPS game like CoD, Halo and Homefront.