Greetings, adventurers.
Thanks for the request! As a glamour enthusiast myself, I can certainly understand why some pieces of body armor would look great without shoulder gear.
Some gear that currently exists in-game is designed with shoulder plates, while others are designed without it. For that reason, if we were to implement an On / Off toggle for shoulder gear, all of the existing gear would need to be redesigned to have two versions: one with shoulder gear visible and one without. This would be a lot of design work that would take away from new designs being implemented in the future! For that reason, we currently have no plans to implement this type of feature.
But don't fret! If you have any specific gear that you'd like to see designed without shoulder plates, tell us here. I'll relay the requests over to the dev. team for future consideration!