It looks very open, as a deathmatch map is supposed to look like
The thing I don't like is the contrasts between the hidingspots and the polygons. The layout is also way too simple, it's like... Pure killing. I don't know if I'm going against the dynamics and stuff that dm is all about, but I thought there always had to be ways of gaining advantage because of brains, not because you can aim better.
In this map, I think the layout of the map requires some more polyblocks in the middle of the map.
The visuals are not that hitting, but that comes after the layout i done, right?
I think you need another layer of polygons to make it easier to shade.
Seems like an okay start of a map to me, nothing more or less.