It's true though, healers can't have complex dps rotation because it isn't their role to do that... if healers are bored devs can remove the power-creep, which will require more healing to be done - which is a legit concern. Making healers be dps characters is against the role philosophy. Tanks aren't meant to have complex dps rotations either. This is partly why most players prefer dps characters - complex rotations, higher numbers. Support characters need to respond to situations with different tools and improvise, which is fun in its own way.