League Play has began and it is riddled with bugs and fundamental flaws unsurprisingly. Apparently users are seeing their wins being logged as losses - some player had 6 wins out of 10 but it was showing as 10 defeats! Also you cannot play with your friends in this mode so far meaning you are relying on absolute randoms for your individual placement. You also can't earn XP but stats count towards your core ones which is another truly bizarre decision.
Bravo Sledgehammer - I swear they are just trolling or spiting the community now. Hard to believe that the only game where league play actually worked well was Black Ops 2.