Do you think changing 2-handed damage for katana from d10 to 2d4 changing things much in theme or mechanically?
Your macahuitl deals bludgeoning damage? What is the special?
I'd have given the jian rapier or longsword stats but allow piercing or slashing damage. (As I do with longswords and a lot of other weapons.)
Again, my system is not supposed to be overly complicated. The katana stats is just supposed to simulate that katanas on averageare shorter, curvier, and heavier at the tip than European longswords. So I shrunk the damage variability.
macuahuitl deals slashing damage on weapon dice that are even. This makes it a slahing weapon that can get bludgeoning magic weapon buffs.
The jian I just fudges to make a slashing rapier.
Untill there is a SBP module, I don't agree with mass dual damage types.