Sheath locations would be fantastic. Honestly they could leave the unsheath animations the exact same - no one will care too much if we could sheath our weapons in different locations and the animations to grab them were off... most people draw their weapon with an attack anyways which skips the unsheath animation anyways.

Ninja : Lower back, over each shoulder, thighs
Gunbreaker : Across lower back (like monster hunter Sword and Shields!) Over the -other- shoulder. Hip.
Paladin : Link Style. Sword and shield on the back. At the same time.
Samurai : Over the shoulder
DRK and WAR : Let us flip the shoulder its on.
WHM and BLM : Let us just walk around with the staff out like its a walking stick/lean on it

Just off the top of my head.