User blog comment:AntiScootaTwo/"Exo Survival" co-op revealed for Advanced Warfare/@comment-1187559-20140926194510/@comment-31.151.120.186-20140927125018

^this. Exactly this.

My main problem with the survival modes from MW3 and Ghosts is that it's just a multiplayer map with bots. Very few extras. Zombies/Extinction takes place on totally unique maps (well some zombies maps were based on multiplayer maps, but it's definitely not the same) with loads of special features (perk machines, mystery box/weapon locker, scavenge piles) and a completely different vibe. MP maps cannot achieve this. Would Zombies have been as popular if it was just a MP maps where bots with zombie skins spawned? I doubt it. If they'd make totally unique Exo-Survival maps, I think people would appreciate it a lot more.