D'karr
Adventurer
devoblue said:
The trade off for the players is to choose piercing and finesse, or slashing. Slashing is a more effective damage type that piercing (I think), and a slashing and finesse combo would be a no-brainer.
In terms of game mechanics this is not relevant since all weapons work the same against all armor types.
The few exceptions, like half damage for not using bludgeoning weapons against skeletons, don't make a complete body of game rules that would apply in this case.
Historically, slashing weapons became near useless against heavy armor unless they could punch through it, such as the Two-Handed Sword or the Hand and a Half (bastard) sword. Bludgeoning and piercing weapons were much more effective for attacking Heavy Armor since they could crush the enemy or slip through the defenses of the armor.
However, in game terms none of this things are really applicable. Since all weapons are equally effective against all armor types, in game terms, allowing a scimitar to be used with finesse as an exception seems to me to not affect anything in the overall scheme of game mechanics.