Powersword makes all other melee weapons, as well as Zealot and Ogryn, irrelevant

Warhammer 40,000: Darktide Gameplay Feedback
146

Fixed an issue where the Artemia Mk III Purgation Flamer could get a crit perk despite being unable to crit.

The miscommunication appears to be that this line doesn’t say they fixed it by allowing the flamer to now get crits