If I was a crossbowman, I wouldn't take a 1h weapon, I'd take a +3 Langes Messer in 2h mode. Similar stats to a Katana, but with a much more damaging thrust (albeit with the polearm thrust animation). A 1h sword may have a better thrust animation for certain situations, but the sideswing damage with 5PS is laughably low on anyone with decent armor. If you are facing a crossbowman with a stabby 1h sword, you know he's going to be relying on thrusts attacks, so just downblock/facehug like you would against a hoplite.
An xbowman with a 2h Langes is equally deadly with all four attack directions, so they are much less predictable to fight.