I understand the reason why you want to restrict exotic usage to one weapon and one armor piece at a time so that player don't become overpowered. But in the weapons category, there are three different subclasses of weapons: Primary, special, and Heavy. And while you're using one, you are not using the others until you choose to swap them out, therefore are not benefitting from that weapons functionality and individual perks. Allowing us to be able to equip three exotic weapons wouldn't cause an imbalance pve as long as they are different weapon classes. Because it is completely inconvenient for players to have to swap weapons out the hard way, in the middle of a nightfall or daily heroic just so you can use a different exotic weapon. Please Destiny Devs look into this.