So, I really like where ZoS is going with the vampire changes of requiring certain stages to get the passive buffs. But I'm afraid most people will just stay in their desired stage all the time and forget about the debuffs. Why not give an incentive to feed to make things interesting? My suggestion is to give you a 30 minute Blue level Drink Buff that scales with your level/CP when you feed. This will make you have to make interesting choices between staying in your desired stage and maintaining your drink buff. For those who don't care to make that choice, they can just use regular Blue drinks to maintain a drink buff since you won't be able to have both at the same time. This fits the theme of a vampire where they have to balance their thirst with the level of power they desire.