Either way, I don't expect anything like this to happen anytime soon because the system is already in place and they'd need to do a lot of trial and error to change the system from how it is now.

Even if you got a popup when glamoring that says "This gear is equippable by CJR, WHM, SCH, which classes do you want to receive this glamour?" That would be a nice feature. And if only 1 or 2 of those have a glamour then the glamour function would still be available for the others. And this also allows people that DO want to have the same glamour for all Healers/Tanks/DPS/Casters to not need to glamour multiple times just to have all classes looking like that.

Just some thoughts, hope they're helpful.