...the lights you used are all in the same colour (with low brightness values), that way your map looks all same at first sight, you should at least use some coloured lights for armour and stuff (and lighttextures, too !), for easier orientation. It just doesnt have any contrast anymore, when things are lighted same from all sides. Try to use 1 single sun, and more decent lights (smaller radius), then your map will have nice shadows, too (doesnt look good without).
Maybe some fog would also be nice (try /fog 800), but thats a matter of taste. ;)
I know its hard to find the right positions and values for lights in maps like yours. Just take some more time and try to set them in a way that the shadows look good to you, you already are on the right path :)
Would be worth at least 1 more point ;)
