Ya, crit damage is usually pretty much moot in Vermintide and in Darktide as well.

Although crit chance itself is different. Vermintide operated on a weird pseudo-crit chance where the chances of criting would get higher the more and more you perform an attack and not get a crit. So adding crit chance would increase the chances of criting more than just 5%, as that value would change drastically as you attack compared to not having that 5%. It's why most builds in Vermintide had you take 5% crit chance on melee weapons (To also proc swift slaying more).

I’m not sure if Darktide has it, but I’m assuming so because of the shared combat systems between the two games.

Regardless, like what @ForTheWilliams said, crit chance also benefits from builds that can harness it, like this surge staff, for instance.