I've received Suros Regime and two Last Words finishing at first place. But I've also seen Gjallarhorns and Icebreakers dropping for guys with 0.17 K/D at the end of the match... It's great to be rewarded even if you did it poorly, but I personally think Crucible rewards should be performance based, at least to the point where the best players have a better chance to get a legendary than the rest. That way everyone has a chance, but the top players have a better chance.