Random Thought: Adding Energy Regen to Meditation Mastery

Was going through my Mastery Pages not too long ago & while I was editing a Page I use for Taric/Shen Support, I wondered what would happen if they added Energy Regen to go along with the Mana Regen that comes from the Meditation mastery in the Cunning Tree. Not sure what harm/benefits that would come out of it, but it was a random question that came to mind.