Good to know.
Whisper of the Worm with its catalyst is still the beast it always was. The difference is that you no longer have unlimited ammunition. However, in most cases you probably never fired more than 18 shots during most boss encounters making it viable for those encounters, albeit without much margin for error. In that way, its become like every other power weapon. It isn't going to be any different than using a grenade launcher, or rocket launcher against a boss where you have few shots and may run out of ammunition during the encounter.