Just as mentioned above, the possibility to load the entire flowchart, and to save it. So it will allow to read the flowchart as a file, like an array and json files, this helps on Dialogue oriented projects to be able to fix/translate/edit long chains of dialogues.
I'm still not sure what you mean. At runtime there are two kinds of data for flowcharts: the model (which nodes you have and which they connect to), and the state (e.g. the current node). Do you mean one, the other, or both? Do you want some kind of tool to export a flowchart from the editor and then load that at runtime? Or do you want to load external data in to a flowchart in the editor? It's not clear what exactly you are saving and where, and how you want to load it as well.
Communication is hard and we have this problem with most feature requests. It is surprisingly hard to figure out what people actually mean when they ask for something more or less in passing. To be clear it's helpful to describe things in detail, with step-by-step workflows, screenshot mockups, etc.