I never think I've used a general with negative command, as you described. But in one Eggies campaign I had a really good general with 5 stars or some such. Suddently he started develop vices that influenced morale, and after a surprise attack I mistakenly thought I could repel he also gained "good runner". The two vices combined proved fatal in the next battle, where my troop routed much quicker than I was used to. Suddently he had become a "Questionable couraged inbread moonbeam dancing butcher", yet still 5 star general & "skilled attacker", and I was in serious doubts if I could ever use him again.
Looking back I should have, for the extra challange, but back then I just moved him to one of my remote and secure provinces for an early retirement.



/KotR