This episode was not bad at the same time not very good. The audience and viewers should have already suspected that the Old Lady was the Birds of Paridise because she kept making reappearing roles throughout the episode. Also, I found this episode to demonstrate their new Wudai Powers which the writers could have just introduced throughout the series.
As for Chase and Wuya, they didn't have a big role except contributing to the demonstration which I thought they could have done more.
On the other hand, it was hilarious at the end when Jack thought he had the Bird of Paridise and started talking to it.