The concrete is excessive and not very thought out. It forces the window campers, of which was the cause of the buildings being blocked, to concentrate in certain areas which is way harder to deal with since there are multiple people in the window at once. The concrete blocks movement from point to point (F is really annoying since it is completely incased but only has a fraction of exits as it used to have). Near A there is a catwalk that leads to a blocked building serving it no purpose.
The fun of this map came from the amount of buildings or windows you can be shot from and shoot out of them.
If the buildings weren't blocked the map would return to its former glory.