I've watched a few walkthrough videos of the Paris and HK versions (recognizing that the attraction lineup here will be quite different, but focusing on the overall aesthetic), and they didn't look so bad to me at all. They didn't look fantastic, but they looked like they might be a cool place to walk around - enjoyably different from anything else at WDW. This video from SoCal360, of the HKDL version while the park was practically empty, gave me some optimism:
Therefore, I'm very disappointed to hear that the experience is so different in person, not thematically compelling, etc. I hope they find a way to add a few more interesting/clever props to make it a little more immersive.
Most importantly, IMO, they have to find a way to properly theme the coaster supports/area so that it clearly screams "toy roller coaster." Otherwise we have another amusement park within a Disney theme park situation...