I know this topic has been discussed before, but I don't blame trackless ride vehicles (which are just a medium to move people around) as the problem, but the execution of the attraction that uses them as a problem. Technically you can make a trackless vehicle move around exactly as a small dark ride vehicle like Snow White or Toads. You could technically also make them move just like a doom buggy (follow a path and turn as needed).
I find the execution in Mystic Manor and even Pooh's Hunny Hunt to be well done, especially in Pooh where the vehicles bounce. I also think Luigi's is a unique use of the system that allows individual vehicles to move around each other which couldn't be achieved without trackless vehicles. I know that ride isn't everyone's cup of tea, but I think it's fun (if the line is short enough).
BATB to me is using trackless as an excuse to just make people move around each other in big open spaces. I consider that poor execution.
MMRR has some bad parts in big open rooms, but I do like that Luigi's type dancing can be included and that each vehicle can enter a "slot" during the waterfall scene. So that's a mix for me. I also like that they can follow each other to simulate a train.
You'll probably disagree because this is the most debatable use, but I think Rise is a good execution of trackless because you can split the party to view scenes from different perspectives, achieve cool things like the canon room (when they are working properly) because you can move the vehicles back and forth at a whim, and hook into the drop plates for the escape pod scene. I don't think Rise is achievable without trackless vehicles.
In the end, I think there's more you can do with trackless vehicles than with tracked IF the execution is well done and people can think beyond them dancing around each other. Not every attraction needs them. They should be used to enhance story telling, not have the story telling be molded as an excuse to use them.
