It'd be nice as a reward for leveling more classes and jobs.
If you have a level 60 Dragoon for example, you would be allowed to glamour level 60 and below maiming gear on to anything.
Essentially, if you can wear it under some circumstances then you can glamour it under any.
Bring back that old encouragement to play around with more than just one or two jobs, but without the mandatory feeling of cross-class skills.
Only restriction I would make is AF gear.
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Odd statement for a cat.