I was thinking for how slow your Spartans were in Reach and how low the jump height was, and how quickly sprint ran out and other armor ability did too. In halo 4 players should go faster, jump higher, and armor abilitys should last for longer durations. There is no bloom, no fall damage, and no health like how Reach had a health bar, Halo 4 just has shields, but it will be a bit more difficult for enemy targeting, I think these are all good ideas, to make it easier and more fun but not too easy, which is why they made it harder for enemy targeting, but that's just what I see in some clips and what I hear by opinionated predictions, I'm pretty sure once you grab onto the controller it'll feel more like the true halo people have missed and wanted, which I'm one of those people, because a Halo without master chief, just makes it less fun and less wanted.