It would make sense if certain weapons increased the Melee Defence score. Obviously, swords are very handy for deflecting blows. Perhaps the Riposte skill should actually increase Melee Defence? One-handed axes wouldn’t be very handy, but large two-handed axes could be used for defence in a similar way to a quarterstaff. Spears could likewise be used. Perhaps readying one’s self for defence in this fashion should be a specific skill with a fatigue cost?