This so called expansion is not connected to the base game. You cannot go from one to the other.
I should be able to play this without all the extra space needed for the base game.
I’m not going to waste ~80GB of space for a game I’m not going to play.
You do realize aside from the map it is the same game right? Without those assets you won’t have a player model, 99% of items, building sets, and it would be a chaotic mess of missing meshes and textures.
Secondly, no u if you think they can just splice together a core without shared map assets and trim the files just if you don’t want the base map installed.