nah, katana and inventing basket hilt are too hollywood, not to mention super complex in the case of a basket hilt. i think your design input will be limited to the types of weapon designs available at the time. with that said, they did mention your blacksmithing mini games will affect the final look of the weapon. again, i think the degree of player control over that will be limited for realism’s sake. but who knows, maybe you can grind your sword into a katana shape then watch it break on first use because the method and material used is a western method based on technology and knowledge available to a blacksmith in 1403 bohemia.