Not bad :) , I know the rocks are not the main thing, but i would work more on them, and I would also define more the foot since its on the front of the scene.
So people who live in countries that were not allied with the US or USSR during the cold war shouldn't be allowed to complete jobs for the "western market" (whatever that might be defined as)?
Then tend to be used a fair bit in the newer procedual methods of texture creation and is used to define edges for edgeware etc. Check out you tube for some dDo videos.
I guess it's all about just defining what it is you want to see, a certain level of trial and error, and then making sure your team is on the same page haha.
Your texture is really holding back your model. Especially the spec - don't generate your spec by just making a contrasty diffuse. Actually define the material properties.
TBH I think you could get the same amound of detail with a 3000-poly mesh. There are too many polygons which don't help defining the silhouette at the moment.