I say keep sprint, Think of huge maps. Blood Gulch? HUGE! i'm not going to frolic my way over to Blue Base just to get shot, respawn, and try agian! Atleast keep the running speed like Halo 3 had. Valhalla had it's way of getting around, Warthogs, Banshees, Mongoose, Grav Lifts. I'd be fine either way as long as it has some way of moving, we are a spartan II again. So we run faster without Sprint. I'd be fine with or without sprint.