Think I've figured out how to fix the WHB line - boost the damage slightly (maybe about one extra bar of damage) and then divide that into split Normal/Piercing damage. Keeping the +dmg against Beasts is not strictly necessary, but would be nice.
I believe that this would not only make it much better against Beasts, as well as useable against Fiends (and it would murder Pit Bosses).
Discuss.
Already suggested?
I remember telling someone why not making the bites do piercing and the slash normal.