I still have to elaborate what happened with our implementation of that hotspot parser. Yes, it sounded great on paper, but in practice our solution required too much tweaking to make it work properly, so we had to settle with another approach (which I'll be discussing in our upcoming Asylum stream).
But yes, the plan is to allow easily exporting of whatever you created in the visual editor to Dagon++. A simple JSON structure would be more than enough for that.
I even devised the name for this file format: DAX (Dagon Adventure EXchange)