The additions of the exotic blueprints were a fantastic idea, allowing guardians to buy any previously discovered exotic and the year two version, if it exists. However, if you happened to scrap that exotic before TTK, you're SOL and you have to "discover" the weapon all over again. Discovering something twice just doesn't make sense. I understand why this is for armor: as far as I can tell there is no way for the game to keep track of what exotic armor you scrapped. But the game does keep track of this for exotic weapons within the Grimoire cards! So no bungie, I do not need to discover Pocket Infinity, I already f*#&$* did (as evident through my grimoire collection, which you have access to), so unlock the f*#$* blueprint, please!