I just want to add that we kind of redesigned the inside of most towns. Life has been added, and most of those empty houses now have content associated with them. It's a new experience from the ground up, but we didn't remove anything, just helped it all evolve. We wanted players to have a new experience of the old game. We kept it familiar but it is a new take on an old world.
It will be more cinematic, and violent. It encourages working together, but hints at killing everybody...
There is plenty of new stuff. No spoilers from me, but the new session is going to resurrect FOnline. It's also going to be followed by theme specific DLC type updates every couple of months
This way we can focus our attention on smaller things, instead of the entire game as a whole.
Oh, and did I mention Easter Eggs?