The new JSON features are very powerful and will be useful, but their syntax can be a little tricky. It reminds me of some struggles I've had working with KM dictionaries since those were introduced.
One of the nice things about KM variables is that I can see a complete list of them in the Preferences pane. When something isn't working the way I expect it to, I often keep an eye on the relevant variable in that pane to see when and how they change.
It would be a great time-saver if there were an equivalent way for me to see what dictionaries and JSON objects KM is managing, and what their content is.