I'm incredibly happy that the SM developers put in swords (I suggested this a year ago in the forums, and I'm not sure if they did so because of my suggestion or because they wanted to do it, but it's great either way!); this is just an open suggestion. Add maces/hammers? I'm a fan of medieval weaponry and having stylistically medieval mech is appealing. Now the obvious question is, what would the difference be between swords and maces? Well some ideas are:
1) Maces have less damage and higher knockback
2) Maces inflict blunt/traumatic damage and theoretically would cause fissures in plated armour, so, maces could reduce elemental resistance by a small amount.
This would break the usual sword-sword high-damage obliteration combination by making melee combat a little more needlessly complex and interesting, or even tactical.
Just my two cents
Another thought would be a weapon of power that would take up two slots as its draw back but also be able to hit in the 2-range, something maybe like a great-sword [2-handed use]
One more idea is a Shield-type item that would require both of your turns to use, yet only allow half damage the next hit against you.
And with my two cents added, we now have a thread worth four cents... any more donations?