If you mirror parts with the option Geometry with features you get a copy of the associated drawing with the same name. For mirroring the part the mirror datum is not important, for the drawing it is essential.
1. Improvement: For mirroring of parts it is important to define the direction and the datum of the mirroring
If you mirror assemblies the option Geometry with features is not available, not for the assembly nor for the mirrored parts. Therefore, the drawing of mirrored models is unusable.
2. Improvement: Provide mirroring for assemblies( components included) with the option independent geometry with
