On Oct 29th we launched this site, started writing down ideas for the server and began working on the editor. In a blink of an eye it's been half a year already.
That's that's how the editor looked after 2 days of development, on Nov 1st:
No backend, no project management, no npcs, just a draggable map and some windows.
It's documented on here on the forums, but if I try to think back now it was probably designing the project database (New database format in the editor and its possible benefits) and figuring out PW quest format that took us most time. Each of those about a month. Integrating with the forum also took us a while. Then we had to make all the bugfixes in the patcher to make the changes display correctly.
Figuring out the quests took us a lot of time but didn't really contribute to the game so far. Maybe that's something we should have left for later. Other than that I think we've spent the time well. It was fun.