For the depth of field effect what shader did you use ?
Special user contribution or the one given in A7 package ?

Some personnal things :
Why having smoke effect on zombies ? they already have bllod effect. Smoke shoud only be when hit the level walls or assets.

The flare effect , is not smooth when you pass through , put a light on the room and use a more subtle flare effect perhaps.
Is there any good volumetric light shader with A7 ?