Jyouzu has basically been returned to his original form, without the piercing.
It's not so much the difference it makes to HIMSELF as a character. It's about how much more quickly an enemy can be spiked off now when you combine BS with other character offense.
Combine Bloodletter Stab with WoO and Hallucinogens, and that's a bonus 20 damage per turn FOR FREE. And that's only counting one person attacking the afflicted character.
As I said, he already used to increase damage and used to deal 5 damage for 1 turn, that's why I talked about the difference, 5 damage for 3 turns... the intention is to spike off a char fastly... will you need the 4 turns to kill him?...
That's why I say the difference is minimum, you will just make use of an average of 5 more total damage (considering he already used to deal 5... third time I say that). If you let the target bleed for the 4 turns, you are making it wrong...