Would it be unbalancing to change the orisons and cantrips into immediate actions. They are the most minor of magics, yet rarely do they get used... even with the "unlimited times per day" that Pathfinder offers. Anyone?
I find my Cleric of Desna constantly using Resistance and Guidence both upon himself and his companions. I am thrilled with the Idea of orisons and cantrips as limitless abilities and feel it is just enough. As an immediate action it would be too much.