OK, I gave it a try, and I'm not really impressed.
Walking is terribly slow. It follows the "If you want to show it's scary, make it impossible to see!" line of logic that I hatehatehatehatehate. You can go through unharmed once you discover the proper rate of walking backwards while stabbing (seriously, all you have to do is go the opposite direction and time your walk/stop alternations so that the zombie walks into your stab and you back up just in time so they either don't go into their attack animation, or you're out of range by the time they complete it).
Unless you use a gun, of course. Something about "agro", I think it refers to how many zombies spawn and how aggressively they go after you, I didn't bother to dig up the formulas.
On my way back to home base after reaching 100% exp to level 3, there were a couple of guys shooting and about 20 zombies wandering around the landscape. This demonstrated to me a flaw in the spawning logic: gunplay by 2 creates shitloads of zombies, but knifeplay by 6 creates next to nothing. If you're shooting at them, they spawn like wildfire and there's plenty to go around. If you aren't shooting, though, hardly any spawn, and with six-to-a-server you kinda need more than 2 zeds per screen to give everybody a fair chance to moonwalk.
I got fed up with the lackluster battle system, the inability to see and the monotonous pacing of it all. If I go back to a zombie MMO-type game, I think I'll go back to Urban Dead or Dead Awaken.
An interesting concept, but poorly executed.
