Taking 9% of a sorcerer with TC in a different group is totally useless when tanking adds... (It doesn't seem like much but 9% adds up. because you are also lowering the hate of the person who is most likely to pull agro. I would like it to be more but calling that useless is beyond me especially seeing as you can have all the really important skills maxed: heal, cures, kicks, jabs (f silent palm), tsunami, aoe taunt)
I enjoy having my mini amends 9% hate leach and it is cross raid. IE if you are tanking a boss you can put it on the ranger who is not really hurt jousting aoes and get a large amount of hate. If you are tanking an aoe fight you can leach from an aoer and get even more aoe hate but what would a monk want aoe hate for seeing as we are so uber at generating it.
The 5% hate feed is a joke though. I guess with current hate systems it is still helping but ehh 5%... woohoo

... I really don't want it to be more because want to be high on the hate list and when just killing trash. I find this skill gives back the some if not more of agro that is lost when the warriors have players blocking for them.
As for only having one point... ehh throw it in fire breath or something it would probably be better.