Note: I doubt that zanzarino won't keep in mind that if the usage of the card drops to near zero, he will reconsider the modifications (tweaking it).
On topic with the neft:
On the one hand, I don't see why is it a major problem. The thing is, if you are running a heavy duo deck, 2 more quanta wont be a problem UNLESS you are running a rush deck, where speed of deploy makes a difference. Hence, this nerf only cripples decks which previously already had aether quanta shortage.
The only negative effect is, with decks that played based on novas/supernovas/cremation/inmolation.
Mono-aether will still work just fine (Mono with no creature of quanta creation run with ~12 pillars); even more, as aether is a high cost element.
On the other, I agree that the problem of the card wasn't that it was cheap; it is the spell effect. I consider, that making it quanta dependant, makes a more reasonable nerf; and there should be a maximun of creatures you could Fractal.
ie:
Fractal
cost: 9
effect: fill your hand with 4 copys of the targeted creature: each copy costs 4X. X being the creatures element.
So if you want to Fractal frogs:
Each fractaled frog costs 2
+ 2
to play it +9
for fractal. More over if you can't affor the 4 frogs, it will only create as many as your
quanta allows (up to 4 total). Same effect as previous that it drains all your aether quanta.
(This needs to be rewritten to fill the card space description
)