Shadow Hand having been stated and to piggyback on the previous house rules suggestion;

I play with Weapon Finesse as an ability intrinsic to finessable weapons. I have considered making the Weapon Finesse feat give DEX to Damage. I've shied away from it because DEX is already such a strong stat that taking away from STR seems unfair. However, perhaps ask if you can get 1/2 DEX to damage with the Weapon Finesse feat. It would make it more versatile and not as much of a "feat tax" as it currently is for DEX based Fighters, Melee Rangers, Bards and Rogues (to a lesser extent, their sneak attack offsets much of the straight damage loss MOST of the time).

Another point to note, you might want to make the DEX to damage overlap, no stack, with the STR bonus to damage.