User blog comment:Ajrep1994/Team CRDL getting their butts kicked by Pyrrha/@comment-2006510-20140522201251

The animation definitely seems weird (probably a reason for it), but I'm not surprised: Pyrrha's Semblance is that she can control polarity, ie metal - even to the point that she can move a shield the opposite direction of it's owner's wish (as she did with Jaune), in addition to against gravity

With that power, she has great control over human metal weapons, thus easily explaining how she's a great fighter (human opponents with metal weapons/accessories = fairly easy; she just has to compensate for the possible martial arts), but still has a challenge against monsters

As for why it's 1-on-4 in the first place, maybe the tournament is random, not just on who-vs-who but how many-vs-how many