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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Whisper of the worm is now a shadow of it's former self, used to be really good in PvE end game content, now reduced to pretty icon in collections...