Quote Originally Posted by Silver-Strider View Post
You're not raising the skill floor for healers by giving them more to do during downtime. That only occurs if the healing demand is increased.
Technically... perhaps not even that.

The less of healers' damage output is bound up in their filler attack, the lower the relative penalty of excess healing GCDs.

And when it comes down to it, one could just not hit their DoTs if they idled too long and now need to heal when their last application's duration has just elapsed.

Healing requirements don't have any particular anti-synergy with more offensive or non-healing buttons.