This was very fun to play except for three things which I was annoyed with:
Uno - Tree glitch. You know.
Dos - The windows by the player spawn and the dumpster-car-zombie area need to be breakable, otherwise there's no flow between there and it takes too long to go between them and is just annoying.
(On the subject of spawns, add more. Please.)
Tres - The physobjects and the boxes which spawned nothing were annoying because there was little ammo and you couldn't drag the items out of their areas easily. (I couldn't steal the barrels over by the zombie-dumpster-car area to toss in the blue dumpster D:) Add in a few smaller things, like more paint-can sized stuff (Sawblades?) for people to take around the map.
Overall it seemed to fit the Ravenholm theme fairly well, lighting was perfect and bright enough for DMmage. Add in some flame traps like Gregori had setup in the SP level for people to try and fry each other with, and just add some trimming and general brush detail and it's a solid map. If you actually have more than 1 spawn point, that is.