It makes no sense to go through the hard work of getting the neck, ring, wrist GC glams and the mount to then not be able to use them as we wish. It seems like a punishment to those who work towards them. I know some might say who cares as they are just accessories or unimpressive mounts, but for a game that some jokingly state that glamour is endgame it is contradictory.
For example I wish I could use the adders earrings for my White mage and the flame earrings for my monk and blackmage as those jobs are associated with those GCS and area.
Finally I doubt this will happen, but please add enough glamour plates to have 1 for every job (combat,DOH and DOL).