In that third pic with the little spans of grass next to the stairs: who the hell would be mowing or clearing that area. Add some bushes/debree/tall grass in those areas for a little detailing spice.
the arch: move the double arch structure higher up so the flat line lines up with the bottom of the triangular spires, that way the whole thing fuctions as one continual flourish (triangle, upper arch, traingle)
nitty pitcky thing: whoe the fuck leaves giant crates and barrels out by the street? yeah, i know it's CS, a world full of crates at office buildings, desert compounds, and military instalations, but how about a tiny reason why they should be there. If it's a back alley where these shops would honestly be storing things, that's one thing. But if it's a street, break them down to smaller boxes/pots/barrels that human beings could actually use and stack (seriously, how many 8 foot x 8 foot x 8 foot boxes do you run across in normal life) and add little storefront doors or shit next to them to give them some sort of logical placement.