The release of the new installment in the franchise did not go smoothly.
Many players didn't like that in Killing Floor 3, the authors decided to tie perks (classes) to specific characters (this wasn't the case before). The community's opinion was heard.
Tripwire Interactive talked about the Rearmament Update: the developers will offer several free weapon models, and also untie the perks — you can choose any hero and install the perk you like.
Recent reviews of Killing Floor 3 on Steam are "mostly negative": players don't like the small amount of content and the slow pace of game development.