Ok thanks for that. Specifically what I’m looking for is a system like Dark Souls where players can drop in with their instanced data and leave while the single player actors see a seamless transition between online and offline.
A character with stats, a spaceship, a car, a hoverbike and a character inventory all can be imported by the dropins. So each character will have their own instance when they activate multiplayer and then other players can dropin with their vehicles and leave while the “host” character remains. Then the instance ends but the player remains in their original world. This while using world composition.
Do you think your system could work for that? My concerns are on how to store single player variables while allowing the players to bring their items into multiplayer. I don’t want to force mandatory online, the online is basically co-op to help the less skilled players progress through the game but still allow for some invasions and online versus for those who wish.