There has been plenty of users posting Sword of Crota kills in the hundreds and thousands without a Husk drop. Furthermore, all evidence that Husk is dropping in House of Wolves is anecdotal: there are NO videos of someone obtaining one with House of Wolves equipment equipped.
If it isn't bugged, then can Bungie look at either increasing the drop rate, or introducing a new way to obtain the Husk (through Eris, as a purchasable item perhaps). Hundreds (or thousands) of kills for an item that only begins the quest for an exotic is too many.
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My friend got the husk of the pit not long ago after HoW came out. At the same day, he spent the whole day to upgrade it to necrochasm