I think a series of categories for Armors, Weapons, Artifacts, Ships, and Quest Items (e.g. Speak to Ikora Rey) are needed. Plus Bounties and deleted Items (maybe organize them in their own category?).
Right now, they’re all clustered together alphabetically in the broad Items category. Ordering them by Rarity would be a good start, as well as Guardian Class. It would make searching for them a lot faster and easier for when searching Lore-related items that have significance like the Whirlwind or Reef-ship types but cannot be found via the normal categories.