Theming, well it certainly is a city but I'm sure you still could do better. There are a lot of (custom) mapmodels which would fit into the scene.
Texturing feels odd (the futuristic trak5 and gibbie textureset in a urbanic theme, seriously? It seems like you should invert the blendmapped textures towards each other).
Lighting is overbrighted (a day-light map which seems to be lighted like if it were at night with the amount of lamps appearing on the map);
Detailing is once more too concentrated (although less as previous).
Clipping is odd (death material surrounds some huge logo?).
Pickups are off balance and WAY too low (10 riflerounds, 4 rockets and 4 grenades for 32 people? yea sure). Seems like you keep loving the machinegun yet hate all other weapons (especially explosives, which actually shake up the gameplay a bit from being boring).
I wouldn't mind to be more specific, but I don't have time for such thing now. I would advice once more to make some smaller map and do it right for once. Make a proper layout (with playerstarts, weapons, etc all present!), test out and receive input from others (put on Quadropolis if it really has to. I know this actually shouldn't be done but there are exceptions I guess), start making it fancy (texture, add details, light, clip) and voila, a beta version which still needs a lot of revises but it potentially plays and looks better as you spend time on all steps, not just a few.
It's not that huge. The layout is just very open with wide paths (which I personally hate).