Using Zealot's Blades of Faith on a controller is awkward, here's a solution

Warhammer 40,000: Darktide Gameplay Feedback
1

Make it like Assail, where you stay in Blitz mode and you can then use the right trigger to launch the knives.

2

I would love this.
The fact that the knife is thrown immediately makes it way harder to aim.

And I’m on a keyboard…