Gameinformer has yet more info on Halo 4. This comes as an article and video.
http://www.gameinformer.com/b/features/archive/2012/04/16/the-changes-to-halo-39-s-competitive-multiplayer.aspx
The only thing I don’t like in the video is the comment at the end of “trust us.” That almost never ends well. heh
-HFFL