Currently the only Finesse wieldable 'Cavalier' Weapons are Katana's, Naigatana's, Nodachi's, and Wakizashi
With Longswords, and the existing range of eastern swords listed above also being finesse wieldable, it would make sense for a cavalier sword to be usable as a finesse weapon as well.
Outside of it's larger/heavier cousin the Bastard sword, it is also the only 1h sword currently not in the finesse category.
Thank you!