Maybe a little harsh, but true.
The walls are thick, 64 unit grid? Try to make them 16, that's normal for walls. Same goes for the floors/walkways.
Also, a ramp or 2 to the upper level can be good, to make it possible for everyone to get there, or else soldiers and demoman are the only classes that can get up there.
This map is not much better then the previous, except that the doorways are larger. But all your maps that you posted (4, not 3 btw) are practically the same: A large room with something (or nothing) in it.
Also, forum stuff can appear more harsh then it is meant to be.
