Originally Posted by
Mishakai
The reason is because the new architecture is different enough that is simply can't be dropped into 1.X, which is why we even have 2.0 in the first place. Trust me, if SE could have revamped everything w/o a complete rewrite, that would have been the route they took to fix the game from it's release state. Unfortunately, they bumped into so many issues with the gfx engine and it's extremely tight integration to the UI and other things that they were unable to do that with a live game.