I think this perhaps the ultimate ideal for what a D&D dungeon design suite could be. Like putting 4 people collaboratively designing a forest with various drop and slots, that would be rad. The kids would go nuts for it too I bet. Collaborative level design would be cool not just in an educational social way, but would probably produce more compelling environmental designs. Especially for the mazes or traps and all the various things. When you have more than 1 person in the suite at the same time you can build things up much faster. I think editor maybe falls short of what I'd wish, which more like a designer builder suite. Like for each area too, char npc design level etc.
Electron was a lot harder to use than Solstice, and the lack of any kind of backward compatibility kind of splintered that community. NWN2 was I think objectively better with the party control and scripting, but NWN1 was much easier to learn and use on the fly with like no chops. I don't think BG3 would go that far in an editor, but I love the idea of it. It would also be cool if custom heads and voice sets or art assets could be imported to build it out even further. That would be pretty next level