Well, to be fair, what exactly are you doing with your retainers. If you use them to hold glamour items, then the 200 slots in the dresser will be more than an extra retainer could hold (175 slots). For other stuff, you get an additional 70 slots attached to your chocobo. I guess if you need to do a lot of venture farming or need a lot of market board sell slots, then you may have a point, but just because it's not a free retainer, doesn't mean we're not getting more free storage.