i killed him in ng+. fuck him if his rigid ass puts the dumb shogun above all. i wouldn't mind a sequel where you have to overthrow the dumb samurai to save the country from itself.
Killing him is not the fuck him answer. Its the honorable one because youre giving him an honorable death (as he wanted) and letting his legacy go on untarnished. Letting him live is the fuck you ending, because youre dishonoring him by not giving him a worthy death, and because the Shogun will take everything away from him. Hell have to live the rest of his life as a failure, with a tarnished legacy.