I am not sure but this weekend, when I played Trials of Osiris I got like 3 times undefeated. Each time I got an engram too. Not sure if that was just luck or intentional... However, what if very high kill streaks and/or finishing a match undefeated would have a 100% drop of exotics? In PvE we have the option to boringly grind in nightfalls and lost sectors for exotics which is much more faster than resetting the crucible rank 1 time for an exotic drop... Not saying it is unfair for pvp players but it would be a nice "cool to have"-thing to have for pvp players and could give incentive to play better.