Hello. I'm new here. I have some feedback. I colored the OV.
White Line to B: Seems like an unnecessary long line of sight. Maybe re route along the Blue Lines to B and get rid of the section below the White line.
Orange Boxes at B: Possible cover points. Maybe add another train track and box car, some work vehicles? And the CT route straight to B is quit boring and long. Feels like the map is a tad too wide?
Green Box at Mid: Is the current battle area for Mid. If you rotate the shelves along the Red Box and pull back the orange wall on CT side. It will open the Mid up and give CT a bit more option. Right now, T can set up in the bottom right corner and wait for CT to come around that bend.
The underground section isn't needed. Didn't use it once. But keep the stairs at Mid on CT side.
Hope this helps.