If they wanted to make tank like healer, they'd remove combos entirely. Keep a ranged attack, an AOE and a single target attack. If you do certain things like... keep hate and stay alive, every 60 seconds you get to use Primal Rend, Confetor, etc.

Or, make healer more engaging... give them more to do. Tanks essentially have a DPS-lite combo to maintain. Give healers something similar.