Currently other players are only synced if local client is spawned as well. It would be much cooler to actually have the client camera being the sync data target instead of the spawned player.
This would make the following things possible:

• A joining screen on which players are actually moving across
• Player spectation, without the need of beeing spawned (for example destruction derbys or dm games)
• Administrative player spectation (without forcing localPlayer to get streamed in to another player)
• Free camera mode, while player is despawned (So also the map gets generated around it)

Hope you get my point, cheers :)