Do you think Halo 4 will have Just Cause 2 style jump physics? Where if the jump is above a certain height, you start to base jump, and lie flat as if skydiving? Of course, for a Spartan this would be a VERY LONG FALL, about from the top of Construct to about halfway into the abyss before death. This would mean: On very vertical maps, you would be able to have more control over your fall, as well as it is more realistic. You could even have it as an AA or something.
Momentarily hold Sprint while in free fall to deploy a hard light hang glider that reduces descent speed and increases forward movement.