When I load a mission or map with FAF, the map loads but nothing else.
In a coop mission, the entire map loads at once (no map piecemeal as seen in vanilla FAF) and shows nothing else except for one or two stuctures (grey on the HUD) that are non-selectable.
On a multiplayer map, the same occurs except that the ACU "exists" (it is invisible) with the build progress bar constantly filling and resetting.
Game music seems to work correctly as well.