I like what I see besides two things:
-Looks like UT3 rip off (sorry). looks way too much like UT art, especially when I try to remember some custom maps for it. If I wouldn't know, I have been sure it's just another UT3 map.
-I don't like that huuuge gun model. It takes about 20 percent of the screen plane, way too much. Should be much smaller.
Please, don't take those as anything more as my own, personal feelings. It doesn't change in any way that map looks really good. I wisj you good luck with the new Nexuiz!