Just my opinion, but since they keep track on all our data they should be able to implement a way to purchase the item (weapon or armor) once we get it, that will free a lot of space on the vault and you we can keep track on our missing items for the season.
Also the could do it like exotics wit a low power lv but a little bit expensive (like 50 shards) so it won’t break the weapon part economy.
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50 shards heck no, reclaiming exotics from your collection is only 10 shards.