We now have stackable HoTs.  
They are now the most mana efficient thing we can use to heal with, unless it overheals.  Therein lies the problem.  We should consider adjusting our healing style to see if using HoTs as a primary source of healing in a raid is viable.  

The benefits would be: 
Better mana efficiency
More time outside the 5 second rule
Less threat generation

Let me know what you think  :wink: