Why couldn't modding be announced properly? I admit it's unlikely at this point, but when civ VI was announced, I was hoping they'd have something in the game like a Civilization mapmaker as part of the game. My main gaming experience in the past is with Blizzard, which makes modding an essential part of their RTS games, to the point where people who learn how to use it can create any type of game they want. Seriously, people are creating entire MMOs in the Starcraft 2 editor, it's a major part of the game because Blizzard invested in it.
I would definitely like and use a program like that, where you can at least create maps, civilizations, leaders, and other easy modifications in a nice format without messing with the XML files themselves. A map editor, civilization editor, and leader editor as a side program would be pretty nice.