In some TWAB Bungie said that if after the Whisper of the Worm buff it won't be used either - they'll think about moving it to a special slot, it seems to me that time has come. In the special slot it will be able to compete for Izanagi, now it can't.
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I'd love this, great sniper, sounds and looks awesome. However, no one is ever going to use it over an ACTUAL heavy weapon. There's no reason to.