It would be more dramatic to physically introduce Vader in the village rather than on Mustafar, besides it would spare us from looking at that terrible throne room “set”.
omg yes! That was absolutely terrible looking! Vader didn’t look integrated into the scene. Terrible green screen or however they did it. The mustafar sky in the background looked like someone used a noise effect in their video editing software and barely adjusted the settings. It took me right out of watching the show.