zatyka
I do agree that the plugin's interface is a bit clunky and I would have liked for it to be simpler and more straight forward. However, I wouldn't bet on a reworking of the engine anytime soon.
Hopefully, I do think that with it, you can do everything you can do with a basic javascript object (well almost... you can't copy an object by reference... yet :3)
In any case, the JSON plugin's topic is always opened for suggestion =)