We've been hard at work making a map editor and we wanted to share our progress. So far we have expanded in-game building placement to support map-building items like Relays and resource patches. We've also made progress on UI for editing additional data structures like upgrades, players, and AIs. There's still a lot of work to do to bring it all together, but we're happy with the progress so far.
As for a timeline, we're expecting to have something we're testing with fans in about a month, with a version everyone can use sometime in April.