Nice work watabou. This is a cool update.
I'd like to +1 the request for naming the different doors. That means as a game designer I can use them with more deliberate intent.
Also numbering the rooms e.g. room 1, room 2, room 3 in the JSON would be would be a huge win for me. That way I can programatically do what you're doing in this image and use the custom notes feature to write about each of digital dungeon in my campaign. Pretty please ;)