Hello sir and thank you for your feedback. I will remove the small pathway in a site where you can crouch under.
I'm aware that you can watch to mid from balcony and that is because I've not yet added buildings there. All the walls will be changed to close the level. Also some geometry errors will be fixed and other visual glitches. I released this on the workshop to get feedback on the layout so I know what I can improve on.
The vents to mid are there for T if they want to fake B and go to mid and then A. Or for CT to rotate to A.
I will fix the crate so more of the player is visible, I will also try to improve the cover on A.