The 3oc's most updated description says that they increase the chance of an exotic drop with a "Crucible win" however yesterday after losing a crucible match with a 3oc active I was awarded an exotic.
Tl;dr: 3oc can still cause an exotic drop with a LOSS in the crucible.
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Honestly using it crucible works better for me, quicker matches and it working no matter what is nice.