It was on the live stream, you're now able to play custom maps in Multiplayer
If people will be able to play custom maps, that means:
a) every player in the lobby must have the same file already
b) the host will be uploading the map to whoever enters, a la Mount & Blade servers
My question is: how can that work with maps but not with other kinds of mods? I hope they're just waiting to announce it, because it's a big deal to many, including myself.
Thank you Firaxis for custom maps in MP!