Needs balancing. Right now the only way the victems can defeat an Arthas is if they all get one rock, mass up, and throw them all at once. One way to fix this is to remove, or at least drastically lower Arthas' regeneration. Maybe give him health powerups to balance the loss of the regen. Terraining is OK, but could use a little more. The cathedral was a nice idea, but the camara change should only work one way at each of the enterances...otherwise its a pain in the butt to get out of there with the cemera always looking the opposite way you are trying to exit.
-VGsatomi