Currently, to exchange witch's delicacy, you have to go to an npc in Olvia. My base is in duvencrune, so travelling to Olvia takes a lot of time to exchange witch's delicacy for milk. Please add more npcs that can exchange witch's delicacy in big town or city.
I would rather they went back to the old system where you got 5 byproducts for cooking and alchemy, with exchanges in every major city for all of those. I Hate making the decision between more CP and Milk when turning in my byproducts.
I will say, I just Transport my Witch's Delicacy to Olvia, and have an alt turn in the Delicacy once a week. Since I am still trying to push 450 CP I don't have to move the milk, but when I was grabbing milk instead it wasn't hard to just toss any milk I got on a horse until I turned it all in if I was overweight, then ride to Velia and place all the milk in the CM, to get the milk back to Valencia.