I'm glad to see we're wearing him down on this, this is the most positive answer we've ever gotten on the subject, and the admission that it would be possible to do is a major thing in and of itself.

So please, Yoshi-P, I'm showing my interest. This would, sincerely, be the absolute #1 thing that could be added to improve the quality of my game experience. I'm getting to the point, with six total retainers (2 + four extra) that between crafting materials and only really saving glamour items for White Mage, I'm seriously running out of inventory space on a constant basis.

Never fear, even if I could cut out the need to store gear on retainers, I'd still be likely to keep at least two of the extra ones, since just crafting materials and the various types of tokens still require a fair amount of storage space, and I like to keep organized, so you'd still be getting a bit extra money out of me monthly =D.