Interesting tweet. I think it shows the problem in Destiny since day 1 - the engine is tough to work with.
With D2 they put a lot more people on it, but it isn't surprising the game runs into the exact same issues as before.
Seems like such a simple thing to implement, breakdown everyone of the same item, and stupid to have not implemented it from the get go. Funny how stuff like that gets overlooked, even Halo 5 lacks the ability to sell multiples, or all, of a req card.