The vampire foods dont satisfy the thirst moodlet much and it takes several bowls of plasma salad, the plasma drink you can make seems to also be in a similar boat, I feel like that should be adjusted.
Also, curing your sims of vampirism appears to be bugged, I cured a sim recently but found he still had his weaknesses and perks despite being human again, so he is constantly stuck in the fine emotion because of the dampened emotions buff and cant eat food without throwing up every time because of the withered stomach buff, I've tried just about everything to fix this and nothing has yet to solve it :/