a little bit off-topic, but if u type in the console /cg_draw2d 0 the fps, time and "SPECTATOR" is not shown. Just a suggestion. I like the map so far, and you could put in a little ledge thing around some rooms, eg:
_________________
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| _____
| | |
|\ | |
| | | |
| |___________|___|
Like that^^^. Its small, sloped so you cant stand on it and adds detail to your rooms. also add pipes/random go-nowhere vents (not too many) and light fittings around the ceiling and walls. The box is a V V V Rough Human