It takes forever to level up exotics of you are not a career player. I would bet if Bungie checked the stats they would see a lot of people with exotic armor and weapons that they hardly use because it is not fully leveled up. I have well over a dozen exotic weapons and barely touch most of them because I can only invest in one at a time. Most veteran players know that bounties are the best way to level you new gear, and most don't even equip their new gear in combat areas until it is leveled up. We use our best guns and armor to go out and complete bounties. Once the bounty is satisfied we return to the Tower where we equip our new gear ands guns. Once we turn in the bounty the experience is applied only to what we have equipped. This levels up the new gear and we purchase the upgrades with the necessary materials. Then rinse and repeat. Please just save us the trouble with exotics... It's already a grind to level gear if you only play a few times a week. Let us equip multiple exotics in social spaces so we can turn in bounties and level up multiple exotic weapons and armor. All you need is a fail safe that will not let you leave the Tower until you only have one exotic equipped again. If someone turns off their system then logs back in just bar them from any destinations until they have only one exotic equipped. Simple fix that would let many players like myself actually be able to use most of their exotic weapons and armor rather than watch them waist away in a vault...