Ok, I played your map with just A.I... It was pretty good, I like the use of your models but I thought it was wierd that you had 'Zombie prisoners' running free and a bunch of zombies called replaced. I think it has potential, you just have to:
Improve A.I.
Add abilities
Maybe make it that you can pick a certain kind of survivor to make it more team base same with the infected and ect.
Once you improve some things, it'd be better.