The 6 variations of “Minor Brew of xyz” all give you a small benefit.
This is nice and good.
However there is a major drawback on these potions:
Once you used 1 of them they all go on a 30 minute cooldown which can’t be stopped by cancelling the effect (like the enchanted foods) and even after death the cooldown persists while the effect has gone. 
To make the effect more logical I would suggest making either the effect persist after death or removing the cooldown after death. 
Both will have a possitive side-effect: These potions will become more desirable on the trader (Moneysink) 