Sure daggers and spears have some unique features, but swords, axes and hammers aren't any different, basically you could equip a 2h sword and it could well be a 2h hammer and it wouldn't make any difference. It would just be nice to distinguish the difference between the three types, because otherwise could just have swords and take axes and hammers out of the game completely, and it wouldn't make any difference, apart from some aesthetic choices.