Serious question, not trying to be negitive on the Karma change but....

Wasn't the whole "mana battery thing" removed from {{champion:16}} because it was bad for the game? Don't get me wrong, I loved the mechanic as a concept and what's more Karma can't heal allies so it does make a bit more sense on her then someone who can heal allies, but I swear I heard a Rioter say the mechanic was bad for the game and it wouldn't be implemented again. Is it the fact that she has to empower her W with her ult that makes it healthier? Again, not trying to make any statement on the change one way or the other, just generally curious what the thinking behind this change was.
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