Yaya should not be a judge.
If the last episode shows anything, Yaya should not be eligible to Judge. She is clearly friends with the show's main contestants and that appears to give them a heavy advantage.
Going out to drink with them afterwards clearly underscores this.
Maybe she should stick to competing.
I also wonder how this makes the locals feel when these con-heads travel to every con entering and winning and leaving the local cosplayers swinging in the wind after all their hard work.