Helmets, shoulders, gloves, and backpacks can be hidden. Armor and weapons can be reskinned. But if one wants to equip a legendary trinket they have to display the effect? In addition, the legendary trinkets stack and it seems only fair if you have multiple you should get to choose which of the modes is shown. For example if you have all three but prefer the look of two, you are disincentivized from wearing one of them.