Make Gemmed Sallet costume wearable by everyone.
Gemmed Sallet has no sprite, so the costume is the only option available to allow players to completely hide their upper headgear, currently the costume can only be worn by Swordsman,Thief,Merchant characters just like the normal headgear. I propose just the costume be changed to allow anyone to equip it.
Costumes are already disabled in WoE so this would allow the other jobs to hide their upper headgear if they prefer how they look with just their hairstyle, without really affecting anything.
As an alternate suggestion you could add a brand new costume with no sprite that everyone can equip. This would let you set different zeny\item requirements for it.