Hmm I must be playing this game all wrong because the last thing I need is it to be more difficult - we keep getting slaughtered.
Still it does seem like an obvious gap in the rules leading to some 3 musket weilding heroes and so your suggestion makes a lot of sense
Ever seen the movie "Jeremiah Johnson"? Two rifles, a pistol and a knife...all in one fight. I'll admit I can't see Lucy Hanbrook pulling that off though!