User blog comment:Drkdragonz66/Modern Warfare 3 interview: Robert Bowling talks about Spec Ops Survival/@comment-3567527-20110813111819/@comment-3567527-20110814095322

What improvement? You mean the fact that lots of times both friendly and enemy forces ignore each other? Or when they walk into walls (horrid pathfinding), when they walk into grenades (that's been round since cod 4)? Reviewers would't recognize AI if it hit them in the face, a simple replay of the Campaign validates that.