Hello Kirk,
Yes, an option to enable embedding XMP into the RW2 would be excellent. The latest PM5 version is visually more pleasant and I understand that a number of foncionality (that I don't use at present) have been fixed, I would drop 13158 with no regret...
The option should come with a warning that Adobe programs may no longer open RW2 modified in this way. And that anyway some test should be run before working on valuable files. The programs I use (Aftershotpro, PictureWindowPro, IMatch have no problem.
So hopefully a next release will enable this.
Francis