Hm, r_speeds 2000, tons of worldbrush splittings, misaligned textures ... blah bla
I don't want to ruin your ratings, so I posted here.
The gameplay ain't that great either. There are no places to hide, and to many edges to fall off from.
All in all I'd suggest to completely overwork the map. It somehow looks like a 30 minutes map.
You have to learn the basic r_speeds reducing techniques, such as using func_walls for pillars etc. that touch the ground, using the arch tool for pipe like objects and so on.
Sorry for being so harsh, I often exaggerate when judging other's maps.