A bayonet charge is cool, but a character already has it - the Scab Shooter. In a post I made way back in 2025 I suggested something similar - A “Traitor Commisar”. One of the buffs I suggested he would give is to Scab Shooters and Dreg Stalkers - giving them increased melee/ranged attack speed.
Traitor Commisar (And Friends)
I like the way your Scab Sergeant looks though, very cool!