I find your lack of chiburi...disturbing
Am I the only kendo/iaido practitioner here that finds Yasuke (this applies to Naoe as well but she wasn't trained in a kenjutsu school) chiburi's pretty garbage? One of the neat details in GoT (hate to compare the two but for this point I have to), was they had true to life chiburis that actually took the blood off the blade.
A samurai would never sheathe a bloody sword, and a chiburi isn't just for ceremony, it has practical purposes that human oils/blood are bad for the longevity of the blade. I know you can do simple ones such as a basic blade flick, but coming from GoT where Jin would do proper chiburi this was just a weird detail I felt Shadows missed.