hey there,
this seems to be a very usable system for interaction to me.
Maybe excact the one i am looking for 
i am working on a point & click adventure in unreal engine 4. seeing your video i think it can handle all kind of puzzles for that kind of game. what do you mean ? and restrictions you can think about ?
few questions from me:
- what about saving states.
if i reenter a scene with these kind of interactions, are the states saved and when i reenter the scene after some time is everything still as it should, or is everything reset after leaving a scene. - does it work with multiple cameras ?
i will have scenes with multiple camera views, even moving cameras and when the player comes to a specific point the camera will change, or it will follow the char.
can i do that with your system ? - when will it be available and what will the price be for it ??
kind regards
stucki