Nothing? It looks good to me, much better than some submissions I see. I would recommend adding 32 available player slots regardless of the map size. This will get your map played more.

Pros: very good looking map. The amount of detail you put in shows you worked hard on the map. from the rain and fog all the way to the 3d skybox. Cant believe more people havn't assessed your map yet. Cons: I don't have a server to play it on! Improvements: maybe make some mud puddles using a dirty water texture. after all, it is raining.

Sexy, I love the skybox.