I love it. At least a love the mechanic: a very nice double sided quanta control. So if you have no quanta or only air quanta it will switch side (even if it has been buffed).
First the questions:
Is the ability passive - like devourer? I mean can it be lobotomized? and or does the whirlwind keep its ability when combined with BE? How will it work with adrenaline? 3 quanta in up to 5 pool 4 times?
Then the suggestions:
The only thing I don't like is that air already has many means to produce quanta. I would maybe try to transfer the mechanic to an element which does not have such means ... Just a thought: Could it be a Sand tornado, a Dirt devil, a water whirlwind, or else?