Let's take the "limitation" argument at face value just to play Devil's Advocate. They could still help mitigate storage issues by providing an addition free retainer, especially since we're now able to have ten. Oh, but wait. That would lose them money. So...

The fact we're still limited to only two retainers but they keep increasing the amount we can acquire... for a price comes across extremely disingenuous. To clarify, I'm not faulting the devs themselves per se but rather Square Enix.