The way I look at this is it gives the Dev team options they can implement to make the game performance significantly better very quickly, and have those fixes implemented prior to the major US launch. I can assure you that Luthier and the Dev's are away of MANY things that can be optimized greatly and improve performance, but most of those things will take a great deal of effort and Dev time. Something like this can make a huge difference in the reviews the game will get and the directly effect sales, while other issues can be resolved and improved in the background. Scalability is the big idea in a series.. but the manner in which things got forced had made it difficult or impossible to play for lower end systems.
I have played this enough now to start to get a handle on how good I think things will be in the future of this game and I'm excited about it.. Hell, I even got multiplayer to work