My first thought after getting off Luigi's was that it was much worse than Aquatopia.
How is Aquatopia not a good use of the LPS system? You don't know which way the vehicles are going, there are "obstacles" in the path. The vehicles feel like they're moving around randomly, similar to the seeming randomness in the Hephalump scene of Hunny Hunt. Add in the fact that it's continuously loading as a bonus.
Luigi's takes what the system is capable of and choreographs it making an unpredictable system more predictable. To me, that defeats the purpose of using the system. So you may qualify it as a good tech demo, but I see it is totally defeating the purpose of not seeing the track. Similarly, while I haven't been on it, it seems like for different reasons, Ratatouille is also a weaker use of the system. You're moving from scene to scene in a more logical manner, defeating the purpose of the unpredictable ride system.