Looks very boxy and HL1ish. For example... the cliffs you have surrounding the map look like a bix box around the map. You should break up the cliff height and make certain parts jut out. A 3D skybox could also do you well... maybe a refinery in the distance.

So far nothing really screams "Source" and I think you should try taking advantage of the power of the engine. More curves, more complex geometry. Less warehouses full of crates.

Crateophobiacs will love that warehouse pic.

Orpheus is going to have a field day with this. 90 degrees! Some screens are here

http://csm2.net/forum/index.php/topic,918.0.html

Copy paste the whole thing, the link is being stupid. You say its a small map and is for 64 players. Does that make sense?

Meh... So so... Coulda' done with some guidance from here to improve some factors. Also your screens don't work.