I don't know if I'd class the latest episode of Bad Batch as a filler, though it had elements of it. I think I'd classify it as a motivation setter for the squad.
But it wasn't great in terms of pacing or excitment level. I think after the last 2 weeks that they do need to hop back to the Empire and the clone decommissioning story line. We haven't seen Crosshair for a long time.
One speculation