In my brain, wearing gear for roles that aren't the one you currently have equipped will kill you. It is lore-friendly. So, no to glamouring other job gears, and I say this with a heavy heart since I would kill to use the level 60 Astro gear set on my WHM. (the purple one). But, my character would die if she tried to wear it while having a WHM staff equipped. It's the way the world works, and I hope Yoshida agrees.