The only problem with your idea OP is that with the new buff system SD/WD pots are completely useless because they don't stack with the buffs gained from abilities like Structured Entropy. That is ofc if you're using said abilities to gain the 20% buff, if you are not (why aren't you hehe) then yeah that would be nice. More variety in Potion making would make me happy.
There are already negative effects (on herbs). It just needs a different solvent (e.g. insect venom instead of water) and you could use the same system as existing for pots.We should be able to craft potions for all buffs.. but that may require a revamp of alchemy. Plus I am hoping poisons come with assassins guild. How they would work I am unsure of though.
We should be able to craft potions for all buffs.. but that may require a revamp of alchemy.