So Dow3 has workshop support, which is great, however, it also isn't enough. For substantial numbers of people to try out lots of new maps and modes, there needs to be a way to download it directly from in-game. For example, if I join someones custom map, I should auto download it.
This would be similar to how it works in dota2, where new modes and maps can all be had from within the game client.
The problem is that people are lazy, and people simply won't access cool content from the workshop in large numbers if it isn't super easy