This would be an extremely easy thing to implement and it would be a massive boon for building certain looks and styles.
Most of the robes in the game are build with a lot of design in the neck and shoulder areas and look vastly better with no shoulders than they do with any shoulder available in game. People are going so far as to buy the most minimalist shoulders they can find to have the least amount of effect on the look they are trying to create (aka honor shoulders) and these are costing a premium in game because of how many people want to get rid of the football shoulder pads.
Costumes are pretty much universally devoid of shoulders, but any build using the outfit station with actual craftable armor is severely hampered by the fact shoulders cannot be hidden and the vast majority of them ruin the look many people are going for.
The only way to otherwise get rid of the shoulders is to run without shoulders at all, and that is not an option for obvious reasons.