I'm wondering about the status of this one as well. I had filed a bug report with Google before the Trimble purchase, and the explanation I got at that time was that Sketchup uses a third party library for its ACAD import capability, and that there was a bug in the Mac version of that library.
Since the library is developed by others, no time frame was given for a fix. I was told to use an eval version of Pro for Windows and to call back if I ran out of time.
I haven't had to import any 3D AutoCAD files in a while, but that will be changing in the next week or so. I have access to Windows boxes in the office, but man-- it sure would be nice if this were fixed.
Can anyone provide current information on the status of this bug in SU 8 and/or 2013? (I'm currently running 8.)
Michael