It is strictly a viewer with measure capability. They will not be able to create any data within the eDrawing file. If your users are creating geometry in AutoCAD to do their stack-ups eDrawings will not be the tool for them.
How, specifically, are your users going about doing their stack-up work with AutoCAD? Just measuring and hand calculating on paper or what other process? If we better understand the exact workflow we can offer potential solutions for using your SolidWorks data.