There's been some minor visual changes such as the skybox being changed, but most notably the room in the first floor with the computer assortment of computers has been opened up, and can be used as a flank route. While not a perfect solution to the chokepoint leading to the intel, it's a step in the right direction.
Sidenote: I've been thinking about opening up the doors to the outside roof that you could use to sidestep the point, but I'm really not sure it's the best idea.
