Yaarel
🇮🇱He-Mage
The rapier is probably ok, but it has such a strong renaissance and modern flavor. It would be better if the mechanically better weapon has medieval flavor.I love swashbuckling characters, I do. But there should not be one best weapon in the game for a huge swath of characters. But right now, there is: the rapier.
If I want to make a genasi Thief of Bagdad style swashbuckler, I will be costing myself damage output (the main contribution swashbucklers bring to a party) by going with a scimitar instead of a rapier. Likewise a halfling thief with a short sword, or any other aesthetic choices that are, by the math, "wrong."
(See also no one using slings or a host of other weapons, because it's never the right decision to make.)
I'm not sure what the fix is.
Make weapon stats more similar, with only flavor between them? I believe there's an OSR game (maybe either the White or Black Hack) where every class does a set amount of damage, no matter what weapon they're using.
Make weapon stats far more complex, with every weapon being situationally good? The odds are that there will still be a "best" weapon and it'll just take the hardcore math types throwing everything into a spreadsheet to determine what it is.
What do you think? Is this a problem in your game? Have you attempted to fix it in some fashion?
D&D has the longsword (such as a historical claymore) and the shortsword (such as the gladiator gladius). But there is no "normal" sword in between.
The knightly arming sword, viking sword, spatha, etcetera is this sword in between. It is an agile weapon, for both cutting and thrusting (slash or pierce). The stats are comparable to a rapier.
Where the greatsword is more like a historical zweihänder, it is more like a polearm with reach. I would do the stats as follows.
Martial Melee Weapons
Greatsword (2d6 slash) 6 lb. Heavy, reach, two-handed
Katana (1d6 slash) 2.5 lb. Finesse, versatile (1d10)
Longsword (1d8 slash) 3 lb. Versatile (1d12)
Rapier (1d8 pierce) 2 lb. Finesse
Shortsword (1d6 pierce) 2 lb. Finesse, light
Sword (1d8 slash/pierce) 2.5 lb. Finesse
Here the point is, the knightly "Sword" is as mechanically good as the Rapier. So if the player wants medieval flavor go for the Sword, and if wants the renaissance flavor go for the Rapier.
(Obviously, these swords could be more complex mechanically. For example the rapier would be less useful against armored opponents. The Greatsword wielder would be forced to "half-sword" against an adjacent opponent (1d6 pierce), as opposed to an opponent at reach that gets full damage. The Katana is worthless against chain armor. And so on. But D&D simplicity doesnt go there.)