The amount of people you see walking around with droids or Savi Lightsabers speaks for itself, but where they've gone wrong is where Potter hit a home run - Food & Beverage. There's really nothing too special about the quick serve places and there's almost never a line to buy Blue/Green Milk.
If Disney can fix the F&B situation and drop the timeline, then I think the land starts to make a ton of money. Imagine if there was a Baby Yoda experience in the land that was upcharge. Unfortunately, they can't do that right now because of the stupid timeline.