I find this discussion somewhat rhetorical, on OW forum anyway, as OW Ruby is TOTALLY meaningless in the OW alliance since it is not recognized by any other OW partner outside of AA. It has some value (as does AA Gold) for domestic travel on AA (seats, boarding, etc) or when using AA metal internationally, but is without any value whatsoever when using any other OW partner.
I find the designation particularly ironic as Ruby is the most precious of all gemstones but has no sparkle in OW (a cruel joke perhaps?).
I wonder what will happen to OW Ruby after the ATI approval?