KD has a broad impact on skill but when you get down to comparing a 1.1 vs a 1.5 it's not very accurate some people play with fireteams only in skirmish and pub stomp, others quit when they're getting whipped and some wait for combat...once the loser falls they will pop out and kill the winner with their little health remaining(camping). Trials is where it all counts but you still need 2 players to perform. Most good players have a good team, but some players play solo(like me) and it's hard to find a quality team.