That new feature was called "Buddy Boost" which, as the name suggests, involved physically boosting a player on your team so they could reach otherwise inaccessible places.
Unfortunately, or maybe not for some fans, the developers decided to cut the feature entirely as they felt players wouldn't co-operate with each other as intended. It also left the booster too vulnerable to opposing players.
The news surfaced in an interview via Prima Games, who spent some time with Multiplayer Map Design Director Jeffrey Smith and Animation Director Rigsby.
Smith described the Buddy Boost feature as "badass if it worked" but acknowledged "it's really hard to get some random person to co-operate with you." Elaborating further, he said: "You have to let somebody kind of climb up you and get you up and they would get up there. But if you're the one sitting on the wall waiting in a really awkward squat position."
Considering the trolling and general madness that can often, and invariably does occur in public Call of Duty games, it is hardly surprising they came to this decision.
There is a silver lining though, as these inaccessible areas have now been opened up via other methods which should grant players plenty of options when traversing each map.
While the idea hasn't come to fruition, it does show Infinity Ward are trying to incorporate unique ideas into Modern Warfare. They have already revealed the 2v2 Gunfight mode to much acclaim, as well as a 100+ player lobby for the Ground War mode.
There is still over two months until the game is released on October 25 and there could be plenty more surprises along the way. Players may be able to find out about some of those potential surprises on September 12 when the Modern Warfare beta is available on PS4.