I actually find it easier to do with controller on my PC. Right now I DPS with Controller and Heal with Keyboard/Mouse. I just started leveling up a tank and cannot decide if I will do it controller style or keyboard/mouse style. When you have to back peddle to get out of an AoE I just can't move as swiftly as I do with controller so I have been tankings with Controller for now and having no issues with your above statement.
