I would agree with @Prindan and I'm not a fan of potions in MMORPGs as they start blurring the lines of classes and reduce class interdependence. Now, if potions were unique to any spell/skill sets such as poisons or perhaps even some resists and/or other elements that Pantheon may introduce then I'd be ok with it. But don't duplicate classes abilities, even if they were originally introduced as "lesser" forms of the spells to not trivialize a class, inevitably, they will be improved over time further eliminating or reducing the need for certain classes unique/trademark abilities.