I seem to be late to the party, but here goes nothing.
Master's Bladework [-1]
You gain a +1 bonus on all rolls with Weapons to make a maneuver.
Boring. I suggest doubling the bonus and adding some kind of limitation.
Samurai Warrior [-1]
You gain a +1 bonus on all attack rolls made with the traditional weapons of a Samurai (Tanto, Wakazashi, Katana, No-Dachi).
Fine by me.
Follow-through Strike [-1]
Once per scene after you take out an opponent with a weapon attack, you may spend a fate point to immediately make a weapon attack with the same weapon against another opponent in the same zone.
I actually think this could work as written, since a Fate Point is roughly equal to a taggable Aspect which is roughly equal to a turn spent maneuvering. Action-economy-alterers tend to be broken, but this one is limited enough that it could work.
That being said, the overflow suggestion is probably better.
Something Riposte-like could work too, come to think of it.
Mind if I add these to the list?