One of the easiest ways to get people back to Galaxy's Edge and spending money is to offer more customization options. I imagine there will be more droid parts and lightsaber parts very soon. They probably have a road-map for rolling out new pieces. I'm sure they already have an idea of what pieces are unpopular and are looking at what to replace them with. They might even want to consider having a rival to Savi's that sells the alternate pieces, for story purposes, and to cut down on lines.