One advantage they will have is that the modes are inherently being created and launched from the same area. The way I see it is that we will jump into the world and be able to enter "matchmaking" from there either at certain points or by accessing menus. However, it'll all be done while your player is already loaded and you're already in third person within the world/first person within public spaces. I prefer it to be this way as opposed to forcing menus into canon like some games have done before.