halo 4, what it should be like

What would you like to see new / brought back. for me i would like to see dual-wiedling , pickups instead of armor abilities, , the pit and guardian off halo 3 for multiplayer, more armor customization , bots for custom games , file share in pre-game lobby , party viewing theatre, and a a halo 3 like ranking system

truthfully all i want to see is 1-50 rank system and experience instead of credits