Originally Posted by Alrik Fassbauer
Why can't they do such an offline thing again ?

I did a little testing with a World of Warcraft server. There everything resides on the server. Mobs placement, movement simulation (with collision detection), itemdatabase, etc. Both when you roam the world and even dungeons. The WoW client is basically just audio and artwork. It's very hard for private servers to mimic the original servers. There are lots of little details that get lost in translation. Same would apply to Swtor I guess. The server is basically responsible for the whole experience (hence the subscription).