Wasn't there a statement of blizzard that they may think of changing milling so that you can mill more than 5 herbs at once?
It really sucks to keep my inscription dudes up2date with their dailies and work orders because how milling works (you don't even get special pigments anymore or do herbs differ in quality and you only get 2-3 most of the time).
This is a matter under the flag of quality of life imo.