In something which is totally not advertisement for my own threads, I welcome you to read this thread from a while ago:
Overture - Melee Traits - Warhammer: Vermintide 2 / Feedback - Fatshark Forums (fatsharkgames.com)
Maybe you have already seen it. TLDR: Nerf Swift Slaying, change the rest to fill the freed application niches.
EDIT: For those who don’t want to read another thread or discuss Ressourceful Combatant specifically. The idea is to remove the CDR on hit from Swift Slaying and change Ressourceful Combatant so that it no longer needs critical hits to be activated. Instead it will increase CDR on hit and getting hit which makes it more applicable on careers with less crit chance and more consistent and easier to balance.