AutoCAD has a function for XREFs that crops out the unwanted part of the drawings. Revit does not support this, so the whole drawing comes in.

Using Xclip in AutoCAD allows us to place badly drawn drawing at the 0,0 origin point and to crop out unwanted part of the drawing.
Ideally, using a XCLIP in a CAD drawing would not only crop the drawing in Revit, but allow Revit to ignore all the layers that are used outside of the clip region.
This would bring these advantages:
-Allows to place the drawings closer to 0,0 without modifying the original drawing
-Remove unwanted layers
-Clean up consultant drawings without changing them
The result is a smoother Revit experience with less CAD mess laying around.