When i hosted the server, i could say it was a success thought we failed to complete it most of the time but i can guarantee that the map is perfectly doable.I really loved your map. It was richly detailed and the randoms events were good and unexpected. Really loved the choice of music and sound effect when you lose Zone C.
Pros:
-Great attention to details.
-Great choice of music during key events.
-Challenging.
-Scripted events really added to the atmosphere.
Cons:
-Can be a bit confusing for newcomers.
-Some bugs, like one time the zeds coming from the corridor couldnt break the door, had to restart.
-Some areas are a bit too dark.
-People get hurt pretty bad when going to the roof by the stairs because the trigger_hurt is too close to the doors,perhaps making a small trigger_hurt brush with only NPC flag checked can resolve this
And that is pretty much it for now, keep up the great work dude, love your ideas.