I also find myself missing about 80% of my loot, my suggestion kinda simlar to the OP but with a lore friendly twist…Pay a Skritt 10silver for a 24hour buff or whatever you want to call it for him/her to collect my “Shineys” an then i can go vists the Skritt an see all my lovely loot from my kills, tho i would also suggest this NPC be available in lions arch so not to clog up WvW with people getting thier loot.