Spartan felt a little lighter than I got used in Halo Reach and Halo 4, it´s close to the fell of Halo 2 but much faster.
I also miss the special habilities like shield, invisibility and holograms, but I think they will add that as artfacts with limited time and use, similar to Halo 3.
I think there is no control rumble feed back when you got shot.