The idea is to make 1h no shield a bit more viable. Basically, add a 1h sword (and possibly other weapons? But we'd need models for them) that has stats similar to a normal bastard sword/longsword, except you can't use it with shield.
Could make it 2 slots to prevent pikemens and ranged people from having a sidearm that's too strong.
Ideally, it'd be a re-stat of the long espada so I don't have to trade for loom points, but hey...