You know how after the aspect patch you had to carry and activate a valorite weapon to get the same tactics bonus? But to make up for that, they also added a new material (avarite) so you could actually get more tactics (at the risk of losing a valuable weapon of course)?
They should do that. Nerf herding harshly with a regular crook. Linearly scale it so that you get the equal of the current (25% * (Herding Skill / 100)) damage with a valorite crook, and get a bit more with an avarite one.
Something like this (but not exactly this, just general idea)
(25%* t * (Herding Skill / 100)) with t being the following: