Even in the original, the first Bushido technique "Dispatch"? was better than Fight. Not only did it do more damage (typically), but it ignored physical defenses, hit all the time, and you didn't have to wait to charge it up.
I would reccommend sticking with the new damage formula that incorporates weapon power, but put the speed back down to what it used to be, and get rid of Bushido 1 completely (have it do nothing) so that you actually have to wait to get the good techniques.