Escape mixed with ZM mode.

I would like to propose a new idea.
First a detailed explanation about the game mode:
The maps will or should be bigger then most regular maps. The maps will be separated into 3 columns(Unless different maps come with different ideas.) and within the three sections you put breakable gates and try to get to the end point. The end point looks like a escape area and only need 1-4 people to escape depending on the amount of people. Zombies will be roaming around these gates but only the Horde zombies and slashers are allowed. (Not sure if those are correct so the starting two zombies.)
Teams:
Eight Global Risk.
Four Black List.
The reason for four Black List is because they already get the help from zombies, why give them a over advantage.
The Black List are spawned in a special area with paths above zombies and the Global Risk. They are not allowed to get down but there is plenty of paths around the whole map including the escape area. They are also put away from the Zombies so they won't get killed by them.
The Global risk tries to break the gates and enter the escape portal. The gates strength depends on how much Global risk members there are. They have to defend against attacks of Zombies and the Black List. This will lead to teamwork and they must defend and attack to win. Also they can't get up to the balcony or which ever where the Black List are.
Each gate that is broken the zombies stop spawning but only in that area. They are given a time limit and there also is no team switch since that would not work out.
Everyone is given Gp and Exp like a normal Team death match or a Search and Destroy.
Also everyone is given a random crate which can give these items:
Dual desert eagles. 7 days
Fn 2000. 7 days
P90 camo. 7 days
Random ZM spray. 7 days
Gp. 100-10000
Ak-47. 7 days
M4A1. 7 days
And a lot more depending on G4box's decision.
This mode requires Team work to get past every obstacle and gives rewards to everyone even if you lose. ACE is given out to the most zombie kill or human kills.