Right now, the standard character-sheet is lop-sided. It displays 5 pieces of gear on the left, and 7 pieces on the right. TWO of those pieces on the right, however, shouldn't even be there; those are the "Off-hand" slot, and the "Soul Crystal" slot.
Just like your Weapon is literally a job-defining piece of gear, so too are the Soul Crystal and Off-hand slots. In fact, I would display them as such:
FIRST in line (left to right) should be the Soul Crystal, since thematically, it is the most important piece of gear on your person. Next would obviously be your Weapon. The third "Off-hand" slot, however, I would actually HIDE ENTIRELY, unless on a job that specifically uses it. Which, to my knowledge, are literally just low-level BLM's and WHM's, meaning it's effectively a PLD-exclusive equipment slot. Which, whatever, that's fine; only display it for those characters, then.
In terms of the Armoury Chest, I would display them in largely the same order, but move ALL of the icons to the left side of the window, and move Soul Crystals ABOVE the Weapon slot, and Off-hands BELOW the Weapon slot. That would actually perfectly align them, using the exact same amount of space.
I know these probably sound like trivial changes -- and make no mistake, for most players, they are -- but as someone who REALLY values a clean-looking UI, and likes for things to be displayed in a way that makes sense, these changes would really clean things up a lot.
That's all I've got! I hope you guys get a chance to forward this to the Devs. I know it sounds a bit complicated, but if you look at my post while you're actually in-game, looking at your character-sheet (or Armoury Chest, where referenced), I think you'll agree these suggestions would really look a lot cleaner.