I will probably enhance the lighting a bit in the near future. I'm not sure if I happen to play with a high gamma or what, but my screenshots always seem much darker than actual gameplay. I know I've checked it before and never found anything bizarre with my gamma settings, though...
As for the sightlines, there are two fairly large main areas (one per base, the two furthest points are probably approaching 2fort battlements separation distance)
There is also a long hallway (alleyway, if you will) in the "back entrance", which I may add onto to allow more cover. The rest of the map is fairly open; not a lot of close quarters aside from the main interchange between the two bases
Furthermore, if you're going only by screenshots, I took those at FOV(field of view angle) set to 100/110 to capture more of the scene(most people play with 70 to 90); everything looks a lot further apart in these screenshots than they really are.
As for textures, I do agree that it *could* be mixed up a bit and to good effect; however, I am purposely blanding the texturing somewhat as something of an experiment with lighting. Personally I'm rather pleased with how the effect turned out... I'm hoping making the level a bit brighter won't detract though.