So these are the criterias that determine your skill level:
• You gain/loose SL based on every confrontation with another player
• Killing a highly skilled enemy gives you more points than killing someone less skilled
• Points are not transferred from a player to another, they are simply added/subtracted based on the encounter and the SL of both parts (thus, after an encounter, one part may go up 50 points while the other loses only 20)
• The SL is used for matchmaking
Still seems like a shit stat to have. So if I'm in a game full of privates (down Zuip) then my skill will go down because I pwned them and they were below me!!! Makes a ton of sense to me DICE!