I am very happy with the addition of the split screen, and I like the multiplayer options, but a couple of things that would make it better are

1) Be able to turn off CPU opponents and race one on one. This would help the framerate be above 20. It was pretty slow on sebenco climb with all the ships on screen. If records need to be disallowed with less opponents, that would be fine

2) Bring back the time trial multiplayer race from pure, that was a lot of fun because you still got your 1 turbo per lap