The biggest issue woth cores (besides them being necessary for infusion which is assinine) is they don't provide any impact to the game. They aren't impactful. Masterwork perks are barely, if at all, noticeable. The armor perks are garbage and are not percievable. The weapon perks are barely percievable and dont have any impact on player experience. So. Cores are a rare commodity that is useless and lacks impact. Thus, Bungie's reasoning is faulty. Thus, they should be removed. OR. Make masterwork perks percievable. Either way, remove cores from infusion.