Actually, in the game, the long sword is more like what we refer to as a "bastard sword". So if Larian wants to add a proper long sword, why not.
Here is what you can find on wikipedia:
"The term "hand-and-a-half sword" is modern (late 19th century).[8] During the first half of the 20th century, the term "bastard sword" was used regularly to refer to this type of sword, while "long sword" or "long-sword", if used at all, referred to the rapier (in the context of Renaissance or Early Modern fencing)."
No the Long Sword is a bastardization of a Greatsword hilt and a long sword blade. Longswords and Bastardswords are more or less the same thing. The monstrosity Larian has made is neither. I'm going by the currently used names. The names of swords have changed all through history, usually comparing one blade at the time to another blade at the time.
