I am not saying that you are wrong and I really can’t get into a debate about the working of class design the same as I shouldn’t tell NASA how to land a man on Mars because I don’t have the knowledge to do so. It is just my personal opinion that the game has evolved and heading into a direction where something that a pure mana bar just can’t sustain.
This jumped out to me too. You are correct but I have to ask, are RDruid and RSham considered Meta in M+ because of their Healing/Mana efficiency or does the rest of their toolkit come into play? If Bleeds and Disease were more present than Curses and Poisons would their Mana Bar be able to keep them in the Meta spot or would their mana pools get drained quicker?
Overall I am not seeing many healers needing to drink (as much) so the efficiency is present this season with maybe the exception of Evokers that I see taking more sips between pulls.