Right, here are some minor detail nitpicking pictures, I hope at least some help.
Not much to say about the gameplay, it seemed a little stalemating, but this is my 2nd time playing, so... Yeah.
Need some concrete here!
Yeah, uh, this is really minor, but this trim doesn't look right.
Work on perfecting your clipping so you don't accidentally, say, slip into this doorway when running backwards.
Missing dirt track piece.
Honestly, this is too much red brick... I don't like this view much. I think at least your smaller buildings should have different textures.
One thing I find weird are all the wooden ramps inside a concrete storage building. They look out of place because they're wooden, but it's also strange that your map has a complete lack of stairs.
You don't usually put doorways on walls, unless you're going to load something through them, but then they're probably larger. This one looks weird.
Floating barrel.
These are nonsolid. You should make them solid and then clip them.
RED has a blue barrel.
And BLU has a red sign.