Yes, this is the exact engine used in Battlefield 3, so no idea why it has to be 30 FPS, but you can mod it, it will break several things.Maybe it's a graphics engine limitation. Is it still based on Frostbite?
All I remember about the original is that final race in the train tunnel where they turn the map off just before a train comes along in the opposite direction. It seemed pretty short so I guess this was their way of increasing longevity.