This is really just indicating that they've designed themselves into a hole where there is no easy fix.
If they increase healer DPS actions, they will either have to nerf the overall potency of the actions so you're pushing more buttons for the same amount of DPS (Which would feel kind of terrible) or scale up the enemy HP to account for increased healer DPS contribution (Which would be much more of an endeavor but not leave people feeling like they're working harder for less).
If you increase the healing requirements, then you have to worry about all of the mentioned.
The former is still probably the more eloquent solution because it increases engagement for higher skill players without affecting the bottom line much.
