I'm sure this has been discussed before, but I have always wondered why Spriggans don't drop Spriggan Sap when you kill them. I'm pretty sure the official game guide stated that they were supposed to, but then for some reason the developers decided to only have them drop taproot as loot. This would probably not be something that would be appropriate for the USKP to address, but I just wondered what other people's thoughts are on this.
Edit: I'm sorry, I just now realized this was being added to v. 2.0.