Aside from class uniqueness issues, optimal rank is probably my biggest complaint currently still in game. Everything has been said in this thread already from both sides. But, as an example, take a look at every crafter wearing the exact same gear. I wear the same set on my r48 ARM as I do on my r30 ALC (because the stats are better than rank-appropriate gear). No progression, development, or any goals to speak of.

I hope it's removed or at least DRASTICALLY changed so the thought of wearing gear 20 levels above your rank is not only frowned upon, it's actually absurd because the penalties will be so rough. Right now, it's practically frowned upon if you DO use rank-appropriate gear because you're wasting tons of inventory slots for practically no gain.