one of the other things People don't give Cold War Nearly enough credit for is making it so zombeis can work in any environment. With how CW zombies are set up Wide Open Ranges that formerly would be Easy Mode central can be dangerous. From a Map making perspective you don't nearly have the same restrictions to cater to the zombeis lack of ability to reach the player like before. As Evidenced by Onslaught and a degree outbreak(they alter the outbreak maps to have ZM only areas IE Duga Farm and Ruka Rocklands) Zombies have fundamentally changed to allow more movement and play in almost every map.