is one piece episode 730 filler?

The citizens of Dressrosa continue running from the Birdcage and Doflamingo, but become very crowded as the amount of space they have grows smaller and smaller. Some wonder why they are not going downtown to the center of the cage, but are told that a battle is going on there as Doflamingo continues attacking his opponents with awakened string.

The citizens cry out to Riku Doldo III for help as he stands on a piece of rubble. On the palace plateau, the Corrida Colosseum gladiators have moved their fallen allies, who show no signs of stirring.